If you want to swap in the the 4sp hydro you will need the trans tunnel from the StarChief grafted in. The Hydro is about twice the size of the _SLIM_ jim. If you do the tunnel that will be good because you will be swapping in a TH400 a couple years later and it too requires more clearance in the tunnel.
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 My Daddy bought me a car but all I got was this old Pontiac.
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