Had a 72 that I put a 113 cam in and with stock unported (never removed) heads ran 11.99 in 71 GS conv on a great day. Had 3200 converter, B4B and Poston headers, 3.73 gears. I thought that was good for 8.5 comp. Later added Gessler heads and got a 11.66 out of it. Motor was pulled out of a rusty 72 Electra with over 100k miles ala LS like people do today. Bought the whole Electra for $250 back in 1988.
To listen to people talk about 72s, you'd swear it was a Nissan Altima. Other than being a 72 guy myself, I think this is just bad logic. I've got a parts list and build paperwork on my 72 Stage 1's motor. It is decidedly not stock. I feel like almost no one rebuilds a low compression motor, and keeps the low compression pistons, a stock cam, maybe works the heads a little, etc. So basically if at any time in the last 50 years, someone rebuilt the motor (which is pretty likely) there is an above average chance that it's been hopped up a little and there is little or no difference between them.
Not much to tell - this is the cam card from the cam and I wanna say Jim had the install at 6-8 degrees advanced (not retarded, maybe 107-109 ICL?) - closed the intake at 43-45 ABDC or more, causing the dynamic compression to increase. Car ran like a bastard, and the longblock was dead stock...
Just shows the value of a custom grind , fixes the 8.5 compression ratio , near max lift lift for stock rockers, longer duration on exhaust on 123 ecl improved scavenging , no wonder it went!
