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sandcobra164 and
bshupe, will need a tv cable bracket, they don't make these any more so will have too find one in a junkyard or make one, there is a pic on this thread. will need a tv cable rod, this hooks onto side of pump/throttle linkage and connects to tv cable at the back of motor. I called local chevy dealer, they can get them through there classic vehicle distributor for $25. Will need a tv cable, I got mine at local parts store for $16. New flex plate, also might want to consider getting a new torque converter, I got the flex plate for $60 and the TC for $100, it is a 1600 stall with lockup. Also will need the lockup kit, I got mine for $100. This is where I got TC, Flexplate, and Lockup kit
Bowtie Overdrives . The 700r4 is only 1/2 an inch longer than the turbo 400, I didn't need to move the trans/transfer case crossmember, will also need an NP208 from the back of a turbo 350, make sure it comes with adapter, this is a direct bolt up to the back of the 700r4, NO modifications required! Drive shafts will NOT need to be modified, they will bolt right up to the NP208 that came of the turbo 350. That's it, as far as shifter linkages, and trans cooler lines for trans/transfercase, everything is the same no modifications required. Will need to use dipstick tube from the 700r4 it is a little different than the turbo 400.