Being a 70 is a good thing the head bolts are 1/2 where the earlier ones were 7/16.
it also has a taller deck .
and better exhaust ports. stock heads can build around 600 hp with the right cam and short block. 500 hp is easy to build. If he plans on running the T-10 he needs to start looking for a scattersheild now as the lakewood is discontinued. I think they make quicktime bells for the t-10 you would have to check.