355 crank to suit holden rods does the block need to be machined to suit the crank? also is there any other block i can use that has been pre clearanced? if not how much is it worth to have my block clearanced? all help appreciated thanks people also i got some acl 30thou 355 pistons 9:5:1 comp do they fit in the bore without machining? the model number is MKRY9570 for the pistons and im gonna use a scat crank with holden rods and recommendations?
Yes you will need to get the block clearanced for a 355 crank, regardless of what rods you use (personally, i would have gone Chev rods). As Reaper said, any VR onwards block won't need any clearance work. Not sure on how much an engine shop charges for the clearance work, might pay to ring around or talk to an engine builder.
30 thou pistons are exactly that, 30 thou oversize. So, unless your block is already 30 thou over it will need a bore & hone to fit the pistons. If it's more than 30 thou, you will need different pistons.
yeh dont wanna **** **** up ill get it done buy a engine shop and cranks do they have to be balanced or should they be wen u get em?
Yes, you will have to get the entire rotating assembly balanced. That means, Crank, rods, pistons & pins, big end bearings, rings, harmonic balancer & flexplate/flywheel. It's around the $250-$300 mark for a balance job from memory.
