i don't know where to post this question so i'm going to post it here. I'm looking at a 86 iroc-z, the vin number says that it's a 305, but he claims that the owner before him dropped in a 350, i know that there were only 50 5.7 camaros produced in 1986, so is there any way to prove that it's a 350? And it's definetly TPI. thanks a lot.

 

....crawl under the car with a flash light and get the casting number off the side of the block.

 

Ermm.. there prolly won't be one there. I'm assuming this is Carburated ?

You can:

1) Pop a valve cover and check the casting # on the head.
2) Remove the wiper motor, and stick your head in there and look
at the casting number on the top of the motor behind the head.
The LG4 (305's) from that period usually said:

"GM 5.0 LG"

Followed by a casting #..

Basicly, the wiper motor is the only real obstacle form reading the casting #.. Depending on year, they may or may not be one on the side.

-- Joe

 

No, he said in his last sentence that it's a TPI. But yes, the casting number is the only way to verify it without pulling a head and measuring the bore.

 

i think he's assuming it was a carburated 350 before it was put in place of the 305
Andrew