some tips
rb30 block out of skyline r31
cp-spool package or nitto one or manley wit cp - don't waste time on stock rods time u prep them your buying new set
use rb30 twincam pistons - 25/26 pistons in rb30 isn't good idea decking block to much
0 deck
good oil pump - nitto or tomie
line bore hone, - ect
keep compression under 8.6:1
arp head/mians
ask for bottom end to be balanced wit flywheel and balancer
cheers