I am in the process of replacing my 350/205 for a 700r4/205. I bought a trans through maddog trans & had them install a shaft from advance adaptor. now here's what would be convertors need to check out www.teckpak-fitzall.com they offer a adaptor that uses the factory shaft with you cutting 1/4" off the shaft this kit would have help me with clearance issues between the drive shaft & the trans pan. I hope this helps anyone who might be planning the same conversion. I tried to get info from multiple forums but no one seems to have ever done the conversion. maybe advance adapt will rethink there stand piont on sales Vrs free advice to get return customers!! which if there are options I will not be one!!!