Not a bad idea. I will try to use as many existing parts as I can but I'm assuming by your comment on oil and timing that they won't swap over.
Check this one out:
http://paceperformance.com/i-6484911...-8600-gvw.html
Will this L05 allow me to use my current TPI base since I'm assuming it has the older non-vortec heads?
I also saw that the L31 I originally linked to is 4 bolt main. Will that not match to my stock trans since my L98 is 2 bolt?