Do you mean a RENIX era block?
wanna make a REAL stroker? You'll be getting the right block for it...
The RENIX blocks have been bored safely to 4" (that's .125 over bore). Offset grind the crank by .10 and you'll get a 302 (5.0) stroker!
I'd then get the head from a 91-95 4.0, have larger valves installed, along with a better cam and lifters, 1999+ intake manifold, 62mm TB, a nice exhaust header, hotter coil and larger plug gap...
Yeah, if you do this, make sure you also get some extra cash from the trade! Haha...