the compression with the swirl heads will be better, don't forget you'll be replacing a stock .018 shim gasket with a .040 composite.
For the roller cam I would get one for a same year 360 from sealed power, probably less than 100 bucks. reuse the lifters.
I have gone thru the engines today I have decided to use both short block and heads from the 80's engine. Bores are better and will be nice with a honing job.
Have put some work into the heads and valves should be tight and sealing now. Maybe should go with the .018 head gasket again to not loose any comp?
I can't find the cam you mention... would finding someone who can regrind the cam be an option?
