yes posting pictures and especially if you want to maximize the cars power and drive-ability,
swapping to better flowing heads, that flow in the 250cfm or better at .500 lift, would both be a great idea,
upgrading decent decent heads could rather easily boost power by 50 plus hp
reading linked info can save you a great deal of wasted time and cash
https://www.hotrod.com/articles/ccrp-1209-eight-budget-sbc-head-shootout/
http://www.superchevy.com/how-to/engines-drivetrain/sucp-0705-budget-chevy-cylinder-heads/
http://garage.grumpysperformance.co...-corvette-l98-heads-any-good.5521/#post-16619
http://garage.grumpysperformance.co...ose-first-sbc-heads-you-buy.10910/#post-47875
http://garage.grumpysperformance.co...rger-intake-runners-l98-tpi.13785/#post-70716
http://garage.grumpysperformance.com/index.php?threads/crossfire-sleeper.12732/page-2#post-69838
http://garage.grumpysperformance.com/index.php?threads/ideal-tpi-build.12203/#post-59274
http://garage.grumpysperformance.co...ed-up-fuelie-heads-for-cheap.2099/#post-50526
http://garage.grumpysperformance.com/index.php?threads/a-well-designed-c4-exhaust.786/#post-46459
http://garage.grumpysperformance.co...u-buy-bare-or-assembled-heads.534/#post-29038
Stock out of box 461x heads 1.940/1.500
but with very light 3-angle valve job
tested on SF-600 FlowBench
Flow tested at 28" on 4.000 Bore fixture
Lift----Intake----Exhaust
.200---- 99.6-----88.0
.300----155.2-----124.3
.400----189.0-----141.9
.450----190.6----------
.500----190.6-----142.2
.550----192.0----------
.600----192.6-----146.4
*** Short exhaust pipe on exhaust ports
Maxed out porting job, unwelded, 461 X SBC
no epoxy , with 2.055/1.600 valves
tested on SF-600 FlowBench
Flow tested at 28" on 4.000 Bore Fixture
Lift----Intake----Exhaust
.200----131.1-----116.1
.300----187.7-----152.7
.400----230.0-----193.9
.450----243.3----------
.500----259.7-----212.5
.550----266.5----------
.600----273.2-----245.1
.650----278.0----------
.700----282.0-----253.3
.750----283.6----------
***Short exhaust pipe on exhaust ports
Basically this was the sort of Flow
we were getting for C/ED dragster 316 cid
a very long time ago
Note: if ditch near spark plug, between
area around both valves to plug
is welded up ,...then another 4 to 8 cfm
is gained on Intake flow (461 X SBC)
if you also wanted to start welding the entire
chamber floor lowering CCs and increasing
short turn radius on 461x ,
and welding up intake port's roof
water jacket solid .... then it was
worth another 4 to 8 cfm gains .
so some of the very best WELDED up
461x heads were approx 299 cfm @ 28 inches
==========================================
Stock out of box 034 Cast-Iron Bowtie heads
with factory valve job and 2.020/1.600
Tested on SF-600 FlowBench
Flow tested at 28" on 4.000" Bore Fixture
Lift----Intake----Exhaust
.200----117.9----107.9
.300----169.5----123.8
.400----205.0----146.2
.500----216.6----146.6
.550----228.3---------
.600----222.1----148.8
.650----215.8---------
.700----216.8----148.8
.750----217.8---------
***with pipe on exhaust ports
Cast-Iron Chevy Bowtie heads #034 castings
with 2.085/1.580 valves
Flow tested on SF-600 FlowBench
Flow tested at 28" on 4.000" Bore Fixture
Lift----Intake----Exhaust
.200----127.7-----104.6
.300----189.2-----158.8
.400----238.5-----204.0
.450----256.6----------
.500----271.0-----216.0
.550----281.5----------
.600----288.6-----218.6
.650----293.3----------
.700----298.4-----221.1
.750----304.3
.800----308.3
.850----311.4
***with pipe on exhaust ports
all out porting but no epoxy or welding
Brodix Track 1 SBC with Manley 2.080/1.600
Best CNC porting ..by Weld Tech
Flow tested on SF-600 FlowBench
Flow tested at 28" on 4.000" Bore Fixture
Lift----Intake----Exhaust
.200----125.5-----120.4
.300----189.8-----153.7
.400----245.8-----190.1
.450----269.7----------
.500----286.7-----228.3
.550----295.1----------
.600----294.7-----244.7
.650----301.4----------
.700----301.4-----252.0
.750----300.3----------
***with pipe on exhaust ports
-----------------------------------------
Cast-Iron Chevy Vortec heads #10239906
1.940/1.500 OEM valve job and shape
Flow tested on SF-600 FlowBench
Flow tested at 28" on 4.000" Bore Fixture
Lift----Intake----Exhaust
.200----121.4-----98.2
.300----179.4-----123.8
.400----219.2-----137.5
.450----230.6----------
.500----220.8-----146.0
.550----221.6----------
.600----223.1-----151.9
.650----224.7----------
*** No-Pipe attached , bare exhaust ports
--------------------------------------------
Cast-Iron Chevy Vortec heads #10239906
Manley 2.055/1.600 valves
2nd Level porting , not yet all out
Flow tested on SF-600 FlowBench
Flow tested at 28" on 4.000" Bore Fixture
Lift----Intake----Exhaust
.200----143.9-----119.5
.300----192.2-----169.9
.400----235.7-----195.5
.450----252.3----------
.500----264.1-----207.0
.550----258.6----------
.600----265.1-----212.6
.650----271.0----------
.700----271.1-----215.6
.750----272.0----------
***No-Pipe attached , bare exhaust ports
-------------------------------------------
Chevy Fast Burn heads with Manley 2.125/1.600
1st Level full porting job, not yet all out
Flow tested on SF-600 FlowBench
Flow tested at 28" on 4.000" Bore Fixture
Lift----Intake----Exhaust
.200----134.4
.300----190.0
.400----235.5
.450----254.3
.500----270.4
.550----277.9
.600----270.0
.650----275.0
.700----277.5
.750----279.5
.800----279.5
****No flow numbers available on exhaust
were lost on computer's harddrive !!!
-----------------------------------------
GM Chevy LT-1 aluminum heads 2.055/1.600
1st Level porting
Flow tested on SF-600 FlowBench
Flow tested at 28" on 4.000" Bore Fixture
Lift----Intake----Exhaust
.200----138.4----115.3
.300----193.2----154.5
.400----235.7----182.5
.450----250.3---------
.500----261.2----193.2
.550----259.2---------
.600----260.2----200.6
.650----262.2---------
.700----262.2----205.7
.750----263.1---------
.800----264.1---------
***No-Pipe attached , bare exhaust ports
.600" Lift with Pipe flowed = 223.6 cfm
-------------------------------------------
Dart Pro 1 Aluminum 215 CC ports
out of box shape as shipped by Dart
2.055 valve on 2.020 seat lapline
1.600 valve on exhaust
Flow tested on SF-600 FlowBench
Flow tested at 28" on 4.000" Bore Fixture
Lift----Intake----Exhaust
.200----128.5----115.3
.300----181.3----148.5
.400----226.3----178.4
.450----243.4---------
.500----257.0----192.1
.550----268.1---------
.600----271.2----198.5
.650----262.2---------
.700----266.1----201.1
.750----266.1---------
.800----261.2----203.2
.850----257.2---------
***No-Pipe attached, bare exhaust ports
------------------------------------------
Dart Pro 1 Aluminum 215 CC ports
2nd Level porting
2.125/1.600 valve combo
Flow tested on SF-600 FlowBench
Flow tested at 28" on 4.000" Bore Fixture
Lift----Intake----Exhaust
.200----147.8----111.4
.300----208.0----167.3
.400----251.5----198.9
.450----269.4---------
.500----284.6----214.3
.550----295.3---------
.600----299.6----220.3
.650----304.3---------
.700----308.3----224.1
.750----309.5---------
.800----309.5----227.3
.850----310.3---------
.900----309.9---------
***No-Pipe attached, bare exhaust ports
--------------------------------------------
Dart Pro 1 Aluminum 230 CC ports
out of box shape as shipped by Dart
2.055 / 1.600 Manley valves combo
Flow tested on SF-600 FlowBench
Flow tested at 28" on 4.000" Bore Fixture
Lift----Intake----Exhaust
.200----123.0-----117.4
.300----179.4-----147.7
.400----223.1-----175.0
.450----241.7----------
.500----257.0-----193.2
.550----269.6----------
.600----278.7-----193.2
.650----270.4----------
.700----267.3-----204.9
.750----268.1----------
.800----265.7-----208.1
***No-Pipe attached, bare exhaust ports
-----------------------------------------
#492 SBC cast-iron castings (Old LT-1 heads)
Stock out of box factory shape
with 2.020/1.600 valves
Flow tested on SF-600 FlowBench
Flow tested at 28" on 4.000" Bore Fixture
Lift----Intake----Exhaust
.200----115.2-----105.4
.300----165.2-----132.5
.400----195.6-----138.5
.450----202.3----------
.500----208.9-----143.0
.550----208.1----------
.600----207.3-----146.6
.650----208.7----------
.700----210.1-----146.6
***with pipe on exhaust ports
---------------------------------------------
World Products - Dart SBC Cast-Iron heads
stock out of box shape and valve job
( as produced for sale in Aug 1988 )
these were some old flow test numbers
Flow tested on SF-600 FlowBench
Flow tested at 28" on 4.000" Bore Fixture
Lift----Intake----Exhaust
.200----127.5-----107.9
.300----180.7-----136.8
.400----208.9-----145.8
.450----219.4----------
.500----220.4-----150.5
.550----226.8----------
.600----233.3-----154.4
.650----236.7----------
.700----238.3-----155.7
***with pipe on exhaust ports
--------------------------------------------
TrickFlow aluminum SBC heads with 2.020/1.600
out of box shape and valve job, as shipped
Flow tested on SF-600 FlowBench
Flow tested at 28" on 4.000" Bore Fixture
Lift----Intake----Exhaust
.200----139.9-----100.3
.300----200.1-----133.2
.400----234.6-----155.8
.450----238.5----------
.500----237.7-----174.2
.550----238.1----------
.600----237.5-----183.5
.650----236.9----------
.700----238.9-----189.9
***No-Pipe attached, bare exhaust ports
at .700" Lift Exhaust flows =208.7 CFM @ 28
with short pipe attached to heads
-----------------------------------
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