I am swapping a 350 shortblock under my 85 305 TPI heads and intake. My question is what CC are the stock 85 Heads? I don't want to kill my compression. Any other problems I may have with an older block with 85 heads and TPI system?

Thanks in advance

The heads should be 58cc. you should have no problem with the older 350 block since the newer block started in 86, so it should be the same. The only thing you may have trouble with is the knock sensor. the older 350 may not have provisions for that, but you could probably srill and tap a hole.

89 Transam GTA, a few bolt ons

All thirdgen 305 heads are 58cc, and all thirdgen 350 heads are 64cc.

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
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