91 explorer bell housing

Does anyone know where to find a bell housing converter and flexplate package to adapt to a 302/347 ? the truck is a long standing project that has been lifted and was considering a 351 long rod w/cleavland 2bbl heads but the header factor was an impass . That one can stay on the stand for now and the 302 with the trik flows removed and replaced with ? GTP 40 ? will sit in place of the 4.0 . The next question is there a kit to bullit proof the A4LD to hold 375-425 HP and 450- 500 torqe ?
Thanks , nermy

Check these guys out. They build a heavy duty a4ld for high performance 4x4s and they DON'T have a core charge :iceslolan .
http://WWW.TRANS-R-US.COM/transmissions/heavyduty/a4ld/index.htm

just called those guys sounds like they might have just the cure for what i need heavey duty a4ld tranny for 795 and torque converter for 150 problem is id have to have it shipped from florida to ny and then ship my core back down there he said lee myles can do the work but ive had them rebuild before 1 1/2 yrs ago and its already going should i go to them for the install or can u guys recomend