" From: Wrambler242@xxxxxxxxxxx " " " No closed or flat area at all. " They look alot like the 70 Ford Clevelane open chamber heads. d'oh! i forgot - '70, right? the '64-7 head was closed chamber, 56cc iirc. '68-'76, 66cc open. '77-'80 [at least], 74cc open. pistons are different for each; by my calc '77-9 slugs actually have 6cc less dish than '68-'76. only the '68-'70 199 had flattops. as both 199 and 232 have zero deck but 258 is 'down the hole', the '80-'90 slugs fit only 258s and bring it back to zero deck. also, i don't have numbers but as the '80s progressed, chamber vol got smaller again. " I was thinking of building a high compression stroker for the American, but that 27.9 mpg on the last tank kind of makes me want to leave it alone! " How many people have a 60's semi custom Rambler with efi etc and get that kind of mileage out of it? " Not many I'll bet! i bet a stock american with 199 and o/d, with recurved ign and economaster carb would beat that! not as much fun though. ________________________________________________________________________ Andrew Hay the genius nature internet rambler is to see what all have seen adh@xxxxxxxxxxxxxxxxx and think what none thought _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list