Need help deciding on an engine block!!

[87lx58]

The R block uses same size cam bearings front to rear. most people that run R blocks use roller cam bearings. This means to run this block you need a special cam unless there is a new trick part out.. The Dart block is the better way to go if you spend that kind of money for street use because you can use factory style cams and it is just as strong. The A-4 block which is about like an R block will allow the use of factory cams if you can find one. The B-50 block is rated at 600 horse by motorsport. I would use the B block with a girdle. You have to ask yourself how many times are you going to ask your engine to sustain max power and keep it their. I have run into the same problem before when spraying nitrous. I see people all the time having $7000 in mods to a motor running a $200 block and worried about what to do. Get a good block or don't by the blower.