Head and cam swap Goodwrench 350

Z

ZZ71s

Active Member
I am working on a 1983 chevy K20 pickup it has a Goodwrench 350 crate engine and a sm 465 its a pretty heavy truck.
I have a set of zz4 heads I want to swap to.
the engine spects will look something like this goodwrench shortt block zz4 heads edl rpm performer and comp cams exetreme energy 256 with 1 5/8 headers and true duals.
So what do you all think about the cam choice?
 
Id sure like to know your truck weight
rear gear ratio,
tires diam,
compression ratio,
the year the engine was produced

but the cam is very mild, and you could most likely step up the duration and make some upper rpm gains without really hurting a bit of low rpm torque
 
The truch weight is about 8600 pounds the trans is a 4 speed with a granny first gear I am hoping to get the compression ratio about 9 to 1ish the 58 cc chambers might make this a problem I dont know the rear end gear ratio or the exact tire height.
 
just to verify, your cam were discussing, is it the flat tappet hydraulic version you listed or the roller version?
 
This truck is so heavy I want to make the most torque I cann down low .
I think the 163 ports on the zz4 heads will make pretty goodd truck heads.
So how much more duration can I get away with out hurting the low end power?
 
THANKS for posting the link to the cam, its sure to help others on the site, I looked that cam up earlier before I answered, the first time,that cams a decent choice for what your trying to accomplish
 
Grumpy its been a while but I think we might be able to start working on the truck again.
Your Crower link doesnt work anymore can you give me an other cam recommendation?
 
sorry the links no longer valid, I went back and ran your combo and the erson grind I linked to should work just fine
or you can run that summit cam the difference is minor (the erson is my choice but theres really not a huge difference)
 
This is a kind of whats laying around build .
I have the zz4 heads ,intake ,1.6 rockers and a carb sitting around gathering dust.
If this was my truck a 383 would be the minuim I would be thinking about but the guy I am working with doesnt have alot of money .
I think the heads and cam swap will really wake up this old goodwrench 350
and surprise him.
 
I think after scraping together all the parts this is what the engine is going to look like.
Goodwrench 350 with zz4 heads with a .028 head gasket to make athe CR about 9.8ish to 1 the zz4 dual plane intake with a Holley 770 and 1 5/8 D port headers with this cam voodoo 60101 and some 1.6 rockers.
So what do you all think?
 
grumpyvette said:
http://www.pbm-erson.com/store.php?catId=327
erson
E110020K

Id go with this personally, your going to want all the low and mid rpm torque you can get, from that 350, if it was mine ID think about installing a 9:1 cpr 383 rotating kit
Click to expand...

which cam did you mean
 
Do you think I can reuse the head bolts the engine is a GM goodwrench target master 350 casting number 10066036
 
if you run as tap thru the block holes and blow them out with a high pressure air jet and use a wire brush and solvent to clean the bolt thread then dip them in the correct sealant you should have no problems re-using those head bolts

enginerebuild109.JPG

nozzle.gif

torqueingr.jpg


READ THESE RELATED THREADS

viewtopic.php?f=59&t=1264&p=13269&hilit=studs+sealant#p13269

viewtopic.php?f=50&t=50&p=12558&hilit=studs+sealant#p12558

viewtopic.php?f=50&t=1222

viewtopic.php?f=50&t=50&p=12528&hilit=studs+sealant#p12528

viewtopic.php?f=51&t=125
 
we got the engine on the stand and removed the heads everything looks good but when I crank number one to TDC the mark dont come anywhere near the timing pointer.
I think I need a new balancer but this is a GM target master with the casting number 10066036 I am having alot of problems finding info on this engine.
If I cant find a part number how do I know what balancer to get?
 
before you go nuts verify TDC, read these links

viewtopic.php?f=52&t=966

viewtopic.php?f=70&t=1015&p=6237&hilit=timing+tabs#p6237

stocktiming%20tab.jpg



this picture ABOVE shows almost exactly where the timing mark should be when the timing light flashes at idle
stock_tab_2.jpg


some year engines had the timing tab and damper line up at about 2 o,clock on the timing chain cover , some years had that damper and timing tab at about 12 o,clock, obviously if you mix and match two different types youll never get close
 
You must log in or register to reply here.
Back
Top