Manual valve body in street driving?

is there a reason you want forward pattern manual valve body? my trans guy talked me out of it... says forward pattern will limit available pressures, and a reverse pattern will allow for higher pressures (I'm assuming pressures available to clutch pack and band)...

Looking at Turbo-Action's website they don't offer a reverse manual valve body that allows engine braking in 1st gear. Again I intend to road race the car more than drag race so it will be a huge advantage to have engine braking in 1st. Honestly I was originally planning to swap in a 4-speed but after planning it out it would cost too much and take too much time. Plus I'm getting an SCS shifter so missing a gear shouldn't be something to worry about.

EDIT: I'm having trouble finding that low gear set, Summit Racing doesn't have it and I can't find any for sale on eBay. Should I just find an A-999 from the junkyard?