BB crank pulley on a SB?

So, is the alternator in the stock location? What cylinder head? What dampener? I run a March single groove for 68 small block with stock heads and stock size dampener. The eddy head moves the alternator forward and there is one dampener that sits farther out. Fluid dampner? Pulleys are like the shell game and trying to find the pea! If that one doesn’t work. March might be able to help.