Using the same setup as you with the exception of J-heads, am in the process of putting this motor together now. Have had good luck with the Comp roller rockers, they have a similar set for big blocks. Looks like you have the Crane retro hydraulic roller lifters that I'm using- these have turned out to be a pain as far as assembly goes. First they don't fit in the block without a bit of grinding. Put my heads on & the pushrod angle was changed so they hit the pushrod holes in the heads, required serious grinding. So far I've taken apart & washed the block & heads 3 times, what a pain!