Ls In Older Truck Swap

[Grumpy]

Hey all, it's has been awhile since I've been around but I know you can help out.

I have a project in the pipeline that I have some ideas with. 98 K2500 Pickup 5.7 it was an old mans truck in great shape. The motor has locked up and I bought it at a great price. The plan is to do a cab off rehab to the truck. Sandblast and paint frame, new lines, overhaul trans with upgrades.. Basically make a nice turn key truck that I can do a few long haul trips with towing and daily it (Plow my drive too).

I already picked up a used motor that I could probably just drop in but of course I need to upgrade here. I want to try and build an LS fighter that will keep up with a modern truck when at work.

Is it possible to get to 400hp (or at least how close) using the stock EFI? What do you think I will need to get there? I am already planning on stripping it and sending it to the machine shop for checking over anyways. I'll probably do flat tops and cam with tune anyways, is there a better flowing head thats worth looking into?

Am I crazy? Or just

it would help a great deal if you let us know what LS engine year,
its displacement, compression,if you intend to use efi or a carb,
and the heads and block casting numbers and of course an idea as to the budget

http://garage.grumpysperformance.com/index.php?threads/ls-cam.2740/#post-54586

http://garage.grumpysperformance.co...stall-info-in-earlier-year-cars.276/#post-338

http://garage.grumpysperformance.com/index.php?threads/why-is-the-ls-engine-so-good.11713/

http://garage.grumpysperformance.com/index.php?threads/ls1-swap-into-an-early-c-4.886/

http://garage.grumpysperformance.com/index.php?threads/chevy-ls1-related-info.3918/#post-42797

 

[Grumpy]

GRUMPY....My plan, now is to use the existing 5.7 SBC to build something comparable to a more modern 6.0 in a comparable truck power wise. Not to install a more modern engine in an older truck.

I can certainly provide a very well-proven list of SBC parts,
that can get you too that 400 hp level rather easily,
but the issue is similar in that you need to realistically plan the engine build and think about your budget, your skill level and the tools and a place you have access to,do the job.
the all too common problem most guys have is that they don,t take the effort and time to carefully plan
all too many guys just want to look at what they have and throw the parts they get at lower bargain price's together, and if you fail to take into account the component design characteristics thats a recipe for less than ideal results.

lets start with the basics
Do you think, you can you use the existing SBC 350 block after you've removed the rotating component assembly and have inspected the block?
yeah, it might require a rebore and cylinder hone, you can of course , build a 350 if you can,re-use most existing parts ,to do so,
BUT I would be seriously considering building a 383 SBC, as its one of the most cost-effective routes to decent power per dollar spent.
the KEY is building the engine for maximum durability, and selecting the best cylinder heads you can afford, and of course,
matching the components, selected, to match the drive train gearing, and intended power band, and rpm range and fuel octane available..

threads you should read, all the info may not directly match your intended build but youll want the vast majority of the knowledge

http://garage.grumpysperformance.com/index.php?threads/what-to-look-for-in-a-good-engine-combo.9930/

http://garage.grumpysperformance.com/index.php?threads/tbucket-engine-project-dart-shp.3814/

http://garage.grumpysperformance.com/index.php?threads/building-a-s̶t̶r̶o̶n̶g̶-̶3̶5̶0̶-383-for-frank-the-tank….11173/

http://garage.grumpysperformance.co...ng-to-take-awhile-but-theres-good-tips.15295/

https://www.hotrod.com/articles/ccrp-1209-eight-budget-sbc-head-shootout/

http://garage.grumpysperformance.co...ing-a-383-sbc-combo-planing.12168/#post-58778

http://garage.grumpysperformance.co...gine-to-match-the-cam-specs.11764/#post-55571

http://garage.grumpysperformance.com/index.php?threads/bits-of-383-info.38/page-2#post-61958

http://garage.grumpysperformance.com/index.php?threads/scat-cranks-related-info.10930/#post-74729

http://garage.grumpysperformance.co...-for-new-383-sbc-cam-instal.13109/#post-68326

http://garage.grumpysperformance.com/index.php?threads/the-new-215cc-vortec-heads.266/#post-75012

calc injector size
http://garage.grumpysperformance.com/index.php?threads/calculate-fuel-injector-size.1200/