Questionable decisions!

DodgyDan said
Heres some pictures of what I'm working with, found that it's actually a 904 not a 727 - would it be better to work with a different transmission? I will take a better look at my other options now that I'm working in this direction.

I'm not doing anything to this 5.2l at the moment, just popping it in and running it refreshed with new chain and seals/freeze plugs. I havent cleaned this trans, it being clean inside the bell and the fluid looking good is why i had chose it, no other reason

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It should work fine, a shift kit would help it last longer but not critical. Auxiliary cooler is a good idea too. 318s came from the factory in A-bodies with 904 transmissions and those later lockup 904s have stronger internals than earlier ones. FWIW I have a 1965 904 behind the 400-hp 360 in my 70 Duster and it's basically stock inside but has a 2600-stall converter, deep aluminum pan, big aux cooler and TransGo TF-2 shift kit. I've beat on it hard for years and it's held up great.