I'm building a '77 Ramcharger with a 440, 727, 203/205 doubler, dana 60s and 40" tires. I've got a couple questions that are 727 transmission specific and kinda taylored a little for the CRT reverse manual valve body, since that's what's at the top of my shortlist for transmission upgrades. I'll PM CRT, but thought this'd be best discussed in this sub-forum.

Q1; Can I sit on a hill at idle with a 727 transbrake engaged for several minutes.

Reason I'd like to do this is when I set it in park it'll roll down hill a little to take up slack in the drive train. Then getting it out of park is a bit of a bang as it releases the spring in the drivetrain. The transbrake would do the same thing, but it seems to me it could 'handle' it a lot better. That is, if it does not build up heat or have some other issue with idling locked up for a few minutes. I'm aware if the engine dies, the truck rolls down hill. I'd only be planning to do this if I'm in it.

Q2; With a full-manual valve body the pressure regulator is fixed at high pressure. Does this force me to accept harsh shifts, or can I soften the shifts some (not stock soft, but not 'bang'). I currently shift an automatic valve body manually, but if I leave it in 2 or D and let it shift while I'm in 4:1 low range that 1-2 shift is a pretty hard shock on the drivetrain. The manual valve body would make it predictable, but I'd also like to have the option to make is a little less harsh than my buddy's drag car.

Q3; Burnouts in first gear in water are bad... and some posts elude to finishing a burn out on dry pavement in first gear may also be bad for a torqueflight.... But I've never seen a real answer to why. why/what-for and would this translate to an issue if I'm really working-it on a rock ledge ect and suddenly back off the throttle in first gear.

Thanks,
Ben