...not from the factory of course, but swapped! Tuesday I tried to do a tune up, spent all day trying to match up the cap and rotor that was on my car with a new one...no luck....UNTIL we looked up a cap and rotor for a TPI Corvette! I had to undo the emissions tube, but sure enough I was able to find the stamp that said 5.7. It was a pita to do, but wow how crazy.

Now I don't know how many miles it has, but it's still running so i won't worry too much.

 

Congragulations on the new found engine

 

Is there a stamp code for the 350? What do you have?

 

the cap and rotor should be the same for a 350 or 305. The 85 and 86 used the large cap distributor, some part store computers try to sell you the small cap (87-92) style for those cars. Vettes always used the large cap distributor with tpi

 

Yup. And a dizzy could easily be replaced so a cap wouldn't really tell you anything anyways.

 

Exactly the same happened to me, my 86 TA 305 also turned out to be a 350, swapped by the PO. I thought it was just a carb conversion for the first 3 yrs I owned the car, but when I got the heads off - 4" bores.

I had already bought the gaskets for a 305, but wasn't really complaining

 

well that's what made us check haha, and it's now comfirmed. Thanks for the tips!

 

Yes, look down behind the left head, it shows "5.7LG", where 305s have "5.0LG". Note that this doesn't apply to older blocks.