I have a 302 with 65 289 heads. My heads are built with 2 inch valves and has been bored out for more flow. I am going to replace the short block and was wondering how much work would need to be done to use the 289 heads on a 351 W shortblock. I know I will need a different intake. what other things will I have to change to make this work? Distributor? Motor mounts? what size harmonic balancer and fly wheel do 351 w use? Please assist guys thanks