I wouldn't be a master rebuild kit because you can do it cheaper than those kits. I built a high budget stroker but here's a break down of how to build a good cheap stroker
4.0L engine (you already got one)
258 crank, comes with rod and main bearings ($300 shipped on ebay)
258 connecting rods ($125 shipped on ebay)
piston rings ($50 shipped on ebay)
gasket set ($75 at autozone)
have a shop press the pistons to the rods ($50)
that's it, if you were to spend more, I would recomend getting the block bored, you can get a set of new pistons on ebay, in almost any overbore size, for $150 shipped
after that I'd get a cam and lifters, you will probably need new valve springs though.
o yea, get the cam bearings replaced, pay a shop to do it, it's a PAIN in the ***.
I have no idea if they had different cams.
"Nitrous? So is that like viagra for your Jeep?" -mom
"I flopped it"