Thier effects wont match yours, no two engines are the same.
All you can do is try it.
85 VN750 basketcase ( yes its a true 750, and no smog controls, its good to be Canadian)
It will have
a rebuilt 96 top end, rebuilt 85 bottom end
stripped, lowered, raked, bobbed,
reed valve boxes shaved
ported and polished
right side dump exhaust
heads and cylinders shaved for compression
looking for smoothbore sidedraft carbs
possibly fat bob tanks
modified vn800 or sportster drag pipes or I'll just make some Chopperfix Duck's Garage