[great scott]

Ok I my chev runs a strong 454, SM465, ORD doubler, FF14b with Detroit, D60 with chrome shafts, CTMs and ARB, 1410 u joints on custom drive shafts and 44" Boggers. I am thinking about converting to a THM400 because I like comps and the SM465 is a pain to shift. So what do I need t do to make this thing(THM400) survive?

 

[great scott]

Cooler is on the list along with a performance kit, hd converter, shift kit, maybe even a full manual valve body. Witch adaptor do i need, it would be round 400 to round 203

 

[great scott]

The 400 I have is the short 32 spline, the 203 input is also 32 spline, so I think all I need is the adapter? As for the trans I think bigdummy has some good suggestions. Thanks.

 

[great scott]

Just the kinda stuf I was looking for.

 

[great scott]

i just had the shifting out of 1st problem with my 400. i bought the hughes manual/auto valve body which is a manual valve body in 1st and 2nd gear and acts normal when placed in third. i like it so far.

That sounds like a valve I could use.