2-speed Powerglide to 3-Speed Turbo Hydra-Matic 400

Q: 2-speed Powerglide to 3-Speed Turbo Hydra-Matic 400

I am putting a 455 into a 1968 Firebird. It currently has the 2-speed in it. I bought a turbo 400 to put into it. Does the support need to be change? I was told it did not. Also would a 2004a hold up to this motor. How much does it end up costing by the time you get it in?

A: Yes, you will have to change the transmission crossmember if you go with eithre a Turbo 400 or 200-4R. A Turbo 350 will bolt in. The cost of the 200-4R is greatly dependent upon how much you pay for the transmission to start and what you want it to do. If you are just going to run it on the street (read: not street drags) then a stock unit in good shape will last a long time. If you plan on abusing the car as in racing you will want someone to bullet-proof the unit (read:$$$). The archive files discuss this more. I also recommend you get hold of a copy of High Performance Pontiac, April 98 for some good insite.

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