Proper fluid for a mild TH350 build?

Well, I know this is gonna open a can of worms, but I need to ask. Over the years I have done many automatic ****** rebuilds, but not so much anymore. Too busy trying to get my own stuff done. The last few I have done have been Ford C-4's and C-6's anyway.
I will be doing a TH350 in a few days for a friend and that's the one I have a question about. For many, many years the accepted practice on a "performance" oriented ****** rebuild (regardless of make) was to use B&M Trickshift or at least Type F fluid. So that's what I have always done, and had excellent results. Of course that is no problem on an older Ford trans like a C-4/C-6. I know that in the last several years there have been huge strides made in transmission fluids and requirements, so is type F still considered an acceptable choice or is it better to use a more "contemporary" fluid like Dex/Merc or Dexron VI? This is just a street cruiser (57 Chevy PU) not a racer, so I don't think he's interested in a pure $ynthetic like Amsoil, Royal Purple and $uch.
Thanx, and let it fly.

 

dextron 3 is what i used.... just plain shelf brand.. when i change it out im going to royal purple

 

I've always used plain old Mercon Dextron. Here's a link that makes me wonder though.http://www.bracketracingnw.com/forum2/viewtopic.php?f=65&t=1325

 

I've always ran Type F in mine. Never a problem.

 

just a stock type rebuild, dexron mercon, you put the type f in it will make it shift harder, but works fine, but also a little harder to find sometimes......

 

Yeah, I did some searching before I posted this here and I ran into that kind of stuff all over. Seven guys would say, "I only run type F", and then I'd find three guys that said; "No way would I put Ford fluid in a Chevy transmission". So there ya go.
Thanx by the way for that link. That was very informative.

 

type f get my vote, but I have only used th350, th400, c-4 and powerglide

 

Using a top quality brand is more important than using type F. Any cheap fluid will break down faster than a quality brand.
I have never used type F in a GM ****** as I don't see the need for it. If you want a little firmer shift, a shift kit is the answer, not fluid. That would be the same as running two quarts low to get a higher stall speed from the convertor.
I use Valvoline Dex III in my th400 and 350s. a shift kit and stall convetor do the rest. Not to mention using a cooler that is atleast one size bigger than recommended.
Unless the manufacturer of the internal components (frictions and seals) recommends something else, no need to stray from the correct recommended fluid.
Using a synthetic which meets factory specs is only an improvement in quality of fluid and its ability to withstand more heat before breaking down. Never a bad choice, but shouldn't effect shift quality at all.

 

Type F worked good for me in my 200R4. It went 10's and stayed together.

 

ive always used type f in my 350s,,was always told by my builder to use it..

 

I have used a mild shift kit and type F fluid in the TH350 transmissions I run. Never had a problem. Running a TH350 in my truck currently with type F fluid.

 

Dextron for a Duece.
DEXRON for a DEUCE.