i used the felpro head kit a while back when i did my 4000 4 cyl after it hung and bent it's pushrods. head kit had side cover gaskets and all... good kit.
forget the spray... some like it... I have used it on flatheads.. don't normally.
if I had a block with a minor scratched deck i might do it.. but if it's a good deck and head.. it ain't needed.
remember to set valves and then retorque after warm. event he felpro one that says it don't need it. do it.. won't hurt nuttin.