:toothy10: my72 dart has cast j heads they are 202's and are ported , my friend bill is running a 69 dart with alum.mopar heads I believe they are the same as eldo. rpm's. we have match raced 7 times in the last 2 mo. I took 6 of those races, the only 1 I lost I gave him a .5 head start. I think the cast are just as good as the alum. ones. send to a good machine shop. and you will be alright, and they are a lot stronger if you put nitrus to them. good luck Gary. and both cars are almost setup identical.