Re: SBC Roller Block
if you are taking out a complete running old style engine and replacing it with a complete running newer style engine, then it is a pretty straight forward swap.
the oil pan, flexplate, and valve covers are different. most or all of the roller cam blocks up until about 94 all had the fuel pump pushrod hole drilled- but the TBI cams don't have a fuel pump lobe on them.
when it comes to headers and all accessory brackets- everything is a straight swap. once it's in, it will look just like your stock engine, but with center bolt valve covers.
if using a 96-99 vortec motor, then there are a few other things to watch out for- different intake manifold, no water pump bypass hole under the driver's side leg of the water pump, and the fuel pump pushrod hole isn't drilled.
but nothing is a real challenge if you have half a brain and plan things out.
you don't plan sincerity.
you have to make it up on the spot.
wanna hear about 20 years ago when i was too smart to know any better?