Quote:
Quote:
Doesn't the low compression 440 pistons in a 400 bring it up to 10.1? You may have to cut valve reliefs but..... 
you cant put 440 pistons in 400, 440 has 4.32 bore 400 has 4.34 bore and 440 has 6.76 long rod for raised block 400 is low deck with monster bore
you can get .020 over 440 pistons at 4.34" or .030 over at 4.35". 0 deck on a 400 block should be a compression height of ~ 1.932". federal mogul stock replacement pistons are 1.813" CH, so I'd imagine the stock pistons would be ~.120" in the hole. low comp 440 replacement pistons are 1.912" CH, so they'd be ~.020 in the hole if the deck is at blueprint spec.
assuming blueprint deck height on 9.98", .020" steel shim head gaskets, 90cc open chamber heads, and .020 in the hole low comp 440 pistons, you're looking at 9.12:1 compression by the math.
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
| 
