318 hp question

I had a 1972 318 Dart , with heads shaved a little porting , headers , Holley street dominator intake and an 850 thermoqaud off a 1974 440 Road Runner it ran strong , very strong . Kept up with Firechickens and Camaros .
With a few aftermarket parts they go well , nothing wrong with a 318 , besides the plastic timing gear , that should be replaced , have 3 hanging on the wall of my garage . Double roller timing chain is a needed upgrade .