Custom Pistons
Mahle makes a nice piston with excellent ring pkg. In my 408 I used a dish that is iirc 16 cc's or 16.5 cc's and compression ended up at I believe right at 10:70 or so with a 64 cc chamber using an LA block, if you use a magnum block compression may be a bit higher because the deck on the magnum block is a little bit shorter. This is the part# I used Mahle 930271030. The info on the Mahle pistons came from this site, in particular Ramm, Thanks Ramm
BTW: I am mixing 1.5 gallons of 110 to 3.5 gallons of pump 93, this summer I will be switching over to E85, I am at sea level so be careful with compression and iron heads, also I maybe switching over to TF PP190 heads.