for a song I picked up a 99 blazer 2wd that was running like crap.
did you know they only weigh 3500 lbs?
Got it running right-ish already.
I've got it up for sale right now, but part of me says to lower it. Stick wider rubber on it and swap in a V8. From what I can gather all I need are mounts and headers if I want to swap in a carbed motor.
thing is, I want EFI. Does anyone know if the computer can be kept to run the V8 other than flashing a new program on it? can I swap the V8 engine subharness with the V6 one at the connector?
In reply to internetautomart:
i was reading about doing a vortec 4.3 astro and swapping in a vortec 350. lots of guys on the astro forum just add the extra pins and wires for the 2 additional injectors to the factory harness and pcm connectors and just pick up a same year pcm from a 350 vortec truck. the rest is literally plug and play. i dont see why you could not have your pcm programmed with a 350 vortec truck program.
i went carbed in my vortec astro just because i had carb drivetrain ready to go in, but i would rather have done a complete vortec 350 changeover.
very interesting...
I am SO torn right now about selling this versus keeping it.
a V8 S10 would so scratch my RWD itch that has been irritating me since I sold the S13.
I am sure Speartech makes a harness in the flavor you desire. 
I like the idea of running 2 wires better 
ECU is the same for V8 and V6 vortec. (just verified it) programming is different as we already knew.
If I run into a $500 v8 vortec truck it will definately be done.
Maybe I can swap a vortec intake setup onto an old school SBC, I already have the old school....
I didn't see speartech showing an adapter harness on their site.
For Vortec swap just add jumpers for cyl 7 and 8 its batch fire anyway and use V8 pcm. Vortecs came in any flavor from 4.8 to 8.1 and they share exterior dimensions for the most part (8.1 is a big block)
LS serries are quite a bit different
BoneYard_Racing wrote:
For Vortec swap just add jumpers for cyl 7 and 8 its batch fire anyway and use V8 pcm. Vortecs came in any flavor from 4.8 to 8.1 and they share exterior dimensions for the most part (8.1 is a big block)
LS serries are quite a bit different
the "vortec" that he will want to use was used from 96-99 in pickups and up to around '02 in bigger trucks and vans and came as either a 305 (5 liter) or 350 (5.7 liter).
novaderrik wrote:
BoneYard_Racing wrote:
For Vortec swap just add jumpers for cyl 7 and 8 its batch fire anyway and use V8 pcm. Vortecs came in any flavor from 4.8 to 8.1 and they share exterior dimensions for the most part (8.1 is a big block)
LS serries are quite a bit different
the "vortec" that he will want to use was used from 96-99 in pickups and up to around '02 in bigger trucks and vans and came as either a 305 (5 liter) or 350 (5.7 liter).
yeah, that vortec. not the LS variants.
