Yesssss Do it!Currently pondering the idea of a J36...
RL J37 block and RL J37 pistons. Everything else from my J35A8.
The increased bore size would result in 3550 cc, so it can be called a J36.
This is the cheapest way to combine an upgrade with the rebuild, since I would need pistons and block machining if I just rebuilt the J35.
I've pretty much decided against the risk of another junkyard engine.