Ok, so I purchased a 91 Camaro RS about 2 weeks ago and was wondering if it was possible that the engine could have been swaped for a 350? If so, what are some signs to look for that allow you to tell the difference between a 305 and 350? Is the 350 bigger? Maybe some design differences that are easy to tell?
Codes or ID numbers? Just curious cause I have RS badges but a Z28 hood. The VIN says I have a 305. Im pretty sure I have a 305 cause theres still stock intake and exaust.

Thanks,
-Tarnel

 

I had this problem recently. This helped me:

https://www.thirdgen.org/techbb2/sho...hreadid=325848

 

Thanks for the help, Ill go bust out the headlamp and take a look! =)

-Tarnel

 

Now I have a California car and had smog crap up the whazoo. I could not for the life of me get those numbers behind the valve covers. (And I knew right where they were from past experience.)

I had to crawl under my car and look for those 3 large numbers. They were very easy to spot and very clear. If you have problems, I would suggest to jack your car up and take a look.

Cheers and good luck!

 

What would casting number underneath middle of block either 703 or 307 translate too?? Anyone know