hey all, wonderin if i could pick up a little advise........im going to be running some aluminum heads on my 454, ( still shopping for exact ones) but right at the momment im buying pistons, my question is, dont i buy pistons with the correct shaped dome? i mean, its just like ive seen hella designs,( some 2 valve relief, some what looked like 1 valve relif, valve reliefs on what looked like opisite side, ect. ) i understand they affect comp. ratio, but should i buy the heads, THEN buy the pistons? i got 75 chev. stepside that i plan on running in the higher RPMS( direction of my build ) ( just a street truck, not a full out racer) also, at this time , is it a good time to figure out if im doing roller, or non roller?