Sounds like your next big block build might be for the motorhome. MORE POWER!!!! Seriously though, a more modern transmission would likely be as big of a help. My parent's motorhome would be completely transformed by the 6 speed auto that is in my truck. It tows our camper great, but the electronic control aspect of it makes it a bit more of a difficult retrofit into an older model. It can be done, but is probably easier with an entire drivetrain swap. Probably easier just to warm up the big block and add a Gear Vendors overdrive to get a few more gears to help pull it out of the hole when the Vette is in tow. How did the car do?
A very minor issue of the rack is leaking, but the car did awesome... me, I've got a lot to learn.... the difference I need to make up is 6 seconds. There was someone there who I think does the Optima challenge. He was 6 seconds faster then me (won the class).... I wasn't last - call it 'mid pack' but I have so much to learn (not whining, recognizing the challenge that I will overcome).
Ordered a rebuilt rack, should be here by June 2. Will likely lower the front a bit more and put at least one more 'click' in the attack angle of the rear spoiler.
So that was the biggest victory - no more understeer. Will probably put another 1/2 degree of camber in when I lower it. I could also use a bit more sway bar... but all of those things - no biggie... also need to pull quite a bit of fuel out (tuning)....
the motorhome.... what it needs is a cummins or duramax swap. But I'm not sure this is the right motorhome for that.... I dunno, this is an "after race season issue" - I'll consider solutions and start looking at repower options.... but not now, there's racing to do

oh yeah, and moving - signed the closing docs today