First off, Titan has HORRIBLE reputation, at least on naxja.org and jeepstrokers.com. I have read many people describe all different kinds of failures from them. Just do a search on those forums. That being said, I have never ran a titan stroker (nor will I) so this is all second hand internet "knowledge" so take it for what it's worth, and also, I just had to replace my camshaft in my Golen stroker, so they aren't perfect either. Lastly, unless Titan is using an expensive custom offset ground crank, their stroker is NOT a 4.9L as they advertise, and I doubt they are for that price.
Bottom line, 258 crank =
4.5L stock bore
4.6L .030 over bore
4.7L .060 over bore
4.8L with a 4" bore, and you are REALLY pushing the thickness of the cylinders walls at this point
Anything with larger displacement is going to require using longer stroke than a stock 258 crank. Also, the small gain in displacement doesn't do much for you, especially considering the cost in parts that CAN'T be picked up at autozone for under $200.
'98 Sahara w/AX15 & 4.6L stroker, 2.5" OME lift, 32" BFG M/T's, 8.8 w/Detroit Trutracs & 4.10's F&R