70" 340 vs 72" 340 specs please

Instead I used the 273 dual quad aftermarket intake and slap two 500 Carters with no secondary air doors. Idles so sweet yet has the punch of a 750 DP Holley

the Victor intake with a Holley 850 DP would be better yet

340's are made to rev, if your not turning them to 7,000 or higher, you are leaving power off the table. A solid cam swap is next for my 340 and then its hello 7,000

As for compression, I recall back in the early 80's the replacement pistons many were using for street / strip cars was 11.5 to 1. I got old PAW ads with prices for rebuilt 340's short blocks with 11.5 forged pistons for under $1,000 out the door (I get sad looking at the ads, lol)

Stock pistons went out the door for serious racers and besides by 1980 the motors were 10 - 12 years old and getting rebuilt...most of those rides were ran hard and trash years ago, the cars that are still around today were likely baby all their lives