Any difference between the '91 VH45 and the '94?

[qsiguy]

Thinking about replacing my motor with one that doesn't have 200K plus on the odo with a good portion of that boosted. I see someone on here selling a 91 VH for a good price with <100K on it. Anything I'd need to know before I purchased it to install on my '94 car? Will it bolt right in? Any performance differences or features I'd loose? Before I drop in a new (used) motor I'll be installing larger injectors and maybe doing a little work on it to prepare it for boost.

Thanks for the input.

Shane

[jbracy7]

yep you will loose a lil hp and ft/lbs but you gain a lot to

[elwesso]

The main difference is the harness on the CAS, but otherwise it's good to go. You can't use the 94 CAS on the 90-93, so you'll have to splice in a new connector to your engine harness, but I *know* you have the capability to do that... You'll want to use the newer style injectors, and of course you'll need to switch the chain guides.

The 90-93 have the two Siamese ports on the intake runners/head versus the oval ports on the 94, which I don't really think makes a whole lot of difference in the big picture.

The 90-93 DO gain the sodium filled exhaust valves, which is very much a performance gain especially with boost!