I have a 88 Tbi 5.7 pickup that I backdated to th350 from 700r electric speedo I just wanted to state that the tail shaft housings will interchange and all you have to do is nab the speedo gear off of the 700r I did so with a lack of tools so I used a 2x4 and a hammer but needless to say it worked and that's the only snag I ran into for the back date except the crossmember which I had to notch and drill a couple holes in the frame..easy peasy I pull heavy loads and will never own another 700r again...oh one more thing..the vacuum...tee off of the map sensor from the manifold port on the back side of the Tbi and you will be fine be sure to use a steel line.. also I spliced the kick down cable with the TV cable so it would work with my brackets..cheap but effective... the 700r TV cable housing will not fit the 350 turbo all you need is a cable stop from any hardware store and switch out the ends at the motor side bracket that's all... took me two days to figure all this out as it was my first real mod... but it's not really all that hard and I would do it again in a heartbeat