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Originally Posted by rob04gtp
I got the TH350. I know that some of the older trans ams had the pontiac 455 and I have the same frame. I dont know the differance between the olds and pontiac 455 I was talking about the power steering pump. Also do you think I will need frame rails. The motor does 310 hp and 500 ft lb torque. thanks
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the subframe is the same on all these cars. there is a difference in the piece that holds the tranny, if you swap to the TH400 (which I highly recommend) you need another bar that fits the TH400. Engine mounts I'll try the ones for the 403 olds. You should be able to get those in any parts store. If you need the metal mounts that need to go on the block, than you probably have to check the junkyards, as I'm sure they have been discontinued. The 403 olds was used until 79 in those cars. The pump I'm not one hundred percent sure about, yours is sitting on the driver side, if I'm not mistaken. I'd use the pump, but you might need new brackets, depending on the setup of the Olds engine.if you mean subframe connectors with your "frame rails", than I'd have to say the factory did not install them either. However if you have a T-Top car, than it would add some stability. Your main concern should be the 500 ft lb of torque going into the tranny. You could use it, but it will be eaten up rather quickly, you could beef up the TH350 to save weight compared to the Th400, but it is rather expensive, compared to just swap in a TH400.