will big block olds heads bolt right up to a small block i have heard they will, and i have heard you need to run and electric fuel pump and do other modifications to make it work?  is this true, what do i need to do?? what is the best set of big block heads? aside from the the 442 w31 heads of course?

i bought a 76 cutlass that has a 350 rocket bored .030 over, the guy couldnt remember cam specs said it was from idle to 6500 rpm power band though, also he couldnt remember what year the motor was but it wasnt stock.  the heads on it were rebuilt and milled, etc. would i be better of keeping these?

oh fyi it is going in a 79 cutlass if that helps any.  

anyone?