SBC guru's in here please....

[aggie97]

So, I bought a 1987 Suburban 4x4. One owner and 55k miles. Great clean truck and is now my daily. I am working on a plan to give it a little more power and get rid of the TBI setup.

I have acquired a Holley Multipoint fuel injection manifold, I just need to buy the wiring harness and computer.

My question is what are the main differences between the pre 87 SBC's and the 87+ TBI? I am finding that the center bolts on the intake manifold are drilled at a different angle (the intake I have looks to have ability to do both), different valve cover bolt arrangement and 87+ has one piece rear main.

I am thinking of getting one of the edelbrock "packages" with heads and a cam, some cheap ol' summit headers and re-use all my factory accessories and bolt right back up to the 700r4 which will receive a Monster upgrade DIY rebuild kit...and maybe a converter.

Can I just bolt on the Pre 87 heads, my holley intake and then go to town? Am I missing something with the distributor or will I need a specific Dizzy for the Holley EFI?

I could probably leave all of this alone and just install the EFI setup on the current motor but the valve stem seals are 27 years old and so is every other piece of rubber in the motor. It gets a heavy oil smell on cold start up but does not smoke otherwise... Heck, I have even been looking at those 290/330 GM crate motors for pre 87 stuff, just want to make sure I don't have compatibility issues with accessories and transmission crap.

Thanks!

[jyro]

craigslist

http://dallas.craigslist.org/ftw/pts/4804395626.html

[mk5.0]

Back in the early 90's the best engine replacement for the Tbi engines was the vortec engine. Edelbrock actually makes an intake to keep the Tbi setup on the vortec engine.

http://www.jegs.com/p/Chevrolet-Performance/Chevrolet-Performance-Vortec-TBI-Intake-Manifold/750534/10002/-1

Edelbrock also makes a multipoint fuel injection system for the Tbi engines.

http://www.strokerengine.com/EdelbrockMPEFI.html

[aggie97]

http://dallas.craigslist.org/ftw/pts/4804395626.html

this is the manifold I have...just need all the other stuff.

https://www.holley.com/products/fuel_systems/fuel_injection/hp_efi/hp_multi-port_kits/parts/550-810

that is a great deal but not sure it would work for my setup. I may need to call Holley monday.

[BP]

The accessory bolts in the heads will probably different. As long as it's a one piece rear main block you can run a roller cam.

As for the distributor sure you can use it with that setup but you'll need some kind of crank signal to make it SFI. You can use the 96+ timing set and balancer or an aftermarket crank trigger.

Personally I'd weigh the costs and consider swapping to a 5.3 instead. It won't be much more work than doing heads/cam on the old engine and you'll probably make more power and definitely have a suburban friendlier torque curve. Or spend a little more for a 6.0 so you can run L92 heads and make double the power that 350 will.

[Tremor14]

i would x2 on the 5.3 swap. with that truck you are best logging on to www.67-72chevytrucks.com and checking out the 73-87 suburban section. every question you have, has been answered 50,000 times over there.

specifically this sub-forum http://67-72chevytrucks.com/vboard/f...splay.php?f=37

but poke around the rest of the site for more info