I have a 1991 Pontiac Trans Am with a bad 305 (Piston rings) so I think its time to go for a 350.

My question is I found a good 1990 350 from a Camaro and was curious if that would work since its a different model year and "sort of brand". Someone told me the pontiac motors were different form the chevys in the 90's....

I know there is a difference in the ESC Module between 80's and 90's thirdgens, so I'm told but is that a problem for a 91 350 to a 90 305? I guess there was a internally and externally mounted ESC module which was based on the year. Is that a problem for this swap?

Basically I just want to make sure I can do this without any major problems or anything special I have to do other than new chip?

Also my firebird is a manual, does that cause any issues if it came from an automatic?

Thanks

 

90 -92 are all the same .
Speed density (MAP ) using a '730 ECM ; only the memcal is different to suit the application
You need the memcal ( chip ) out of the 350 computer installed in your computer in place of the 305 one and a 350 knock sensor

 

Don't forget the pilot bushing. It'd be a beech if he got it all together and left that out.

 

Ok thanks

 

Also my firebird is a manual, does that cause any issues if it came from an automatic?

Thanks[/QUOTE]

Here's where you might run into problems.
The 350 might blow your tranny. Lots of info in the drivetrain stickies about that.
The 350 engine computer will not be programmed for a manual so it won't run quite right, but can be reprogrammed.