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GoldOlds · 06-24-2007, 12:00 PM

As I debate replacing my Cutlass's 350 with a 455, I keep hearing that '70 and older versions are MUCH better than 71 and newer 455s. Is it a lost cause to find a mid-70s 455 and put some earlier heads on it? I'm looking for mid 13s in the 1/4 mile and I DON'T want to have to bore an engine and/or put new pistons in it ($$$$). Which brings me to my next question; when did the 455 start getting pistons with a dish too deep to get decent compression without replacing said pistons? I'm looking for a compression ratio in the 9.5:1 neighbourhood (pump gas, no additives) when all is said and done.
Thanks!

- GoldOlds

06-24-2007, 12:00 PM	#1 (permalink)
GoldOlds Senior Member Join Date: May 2007 Location: Chatham-Kent, Ontario Posts: 117	455; pre 71 vs. 71 and newer As I debate replacing my Cutlass's 350 with a 455, I keep hearing that '70 and older versions are MUCH better than 71 and newer 455s. Is it a lost cause to find a mid-70s 455 and put some earlier heads on it? I'm looking for mid 13s in the 1/4 mile and I DON'T want to have to bore an engine and/or put new pistons in it ($$$$). Which brings me to my next question; when did the 455 start getting pistons with a dish too deep to get decent compression without replacing said pistons? I'm looking for a compression ratio in the 9.5:1 neighbourhood (pump gas, no additives) when all is said and done. Thanks! - GoldOlds