Swapping out iron J 202 heads for aluminum

273 adjustable. Wanting to stick with hydraulic roller lifters. Wanting to improve performance, the car has decent power right now but this is one of my only hobbies and am always chasing more power. So leaning towards a performance cam and a converter. If rockers and an intake will also help I don’t mind swapping some parts.
as for my goals, a good street machine with the option of the track would be idle.

not a fan of hyd roller deals at all, but lots of guys run them.
With a bigger cam, however you do it, moving to an 8 inch vert is by far gonna show up the most on an ET slip. Any smallblock loves convertor, lots.