hey all i have a 87 sport coupe but i can get a 91 RS with a new engine with 8,000 miles on it, what will be needed to swap the 91 rs 305 engine engine into my 87 which it has a computer. any help i will greatly apprieciate

 

What engine does your '87 have in it?

Any particular issues with your current engine?

 

mine has 136,xxx miles it runs strong but needs a carburator

 

Okay, the '91 will have a TBI set-up, 170 horse. You will have to change out everything associated with the computer - harnesses, sensors, relays, fuel lines, fuel pump (in the tank), etc., etc., etc. The TBI engine has a poor cam, poor heads, poor exhaust (much like what you've got), although the shortblock is basically the same as yours (slightly higher compression). It will be a lot of work for an engine that isn't much better than what you have.

Fix the carb, and if you're worried about a mere 136k miles, go find a 350 to put in under your carb. Much better bang for the buck.

 

the kid says its a carbed 305 outa teh 91, but if it is tbi im lookin at holley 450 cfm ecnomaster carbs, they perform good and are emisions legal

 

If the '91 has a carb on it, it's been hacked up to some degree. Trust nothing, verify everything. It could very well be he doesn't know the difference between a carb and TBI, however.

A Holley 450 cfm Economaster is not emissions legal on any '87 US car.

 

just called the kid he said its not the org motor so it is infact a carburated engine with 8,000 miles on it.

 

Know absolutely what it is before spending any money on it. Get casting numbers, etc.