Join Date: Jun 2000
Location: Gilbert, AZ, USA
4 speed - those are good heads you've got. Lingenfelter recommends either the 041's or the 781's from the mid 70's because of their better quench area. He claims an additional 10-15 hp over other castings.
You can do lots of things with the heads depending on the intended application. If you're looking to street/strip, then stick some large valves in and find a reputable head porter and finish with a good 3 angle.
Good luck with your rat!