I use revese valve bodies....but you will find that most of the big name companies ...that the valve bodies are not going to be much different...
the only down side to the forward pattern is the price...they seem to be about 100 bucks more then the reverse ones...at least the turbo action ones are.
looks like CRT is 275.00 for forward...and 255 for reverse.
There are many manual valve bodies now applying the low band for roller clutch protection which used to be available only on trans brake models. Perhaps consider that feature as well.
Don,t know how well they shift though.
I have a tranzact of indy rmvb in my 904 and i love it. You can get it with or with out the low band apply. I opted for the lba and the price was very easy on the wallet.