Sweet ride looks cool.
Have you tried giving it a little less gear with the cam you have. Since your going to change the gears anyway.
Four speed auto trans would solve alot of your issues. And let you keep the cam that works. No room in the tunnel?
The summit cam: one search onthe internet for wiped summit cams and they dont look as cheap. That being said i do see ppl running them. But i think the advertised duration here is trying to help you out. 274 By letting you know its going to drive like a big cam sep it will fall on its face just when the other cam was setting you back in your seat. Still bad idle still will need gears. You would be better with a longer duration and wider lobe center. Idle would smooth out and off idle power would come back so gears could be changed to a much lower set. I have seen a cam with these specs before and it was the wild racing cam for stock heads back in the day. Sounded good but boring power. Often sold as 3/4 race cam to ppl that dont know any better.
I would call comp and have them run the numbers on a nice roller for the car. With smooth idle and good power. You will be on the phone for an hour but will be worth it. A cam considered strong for efi car my be the best bet.
Either you will make power with crazy idle or smooth and less power. Not much way to make a cam sound big and still be streetable.
Hyd flat tappet Have you looked at the Comp thumpr cams they will still need some gear and idle is bad but may be more of what will work with your ride. They also are fast not just poorly timed. But many ppl think they are crap. So who knows. Llight car and gears it will be right where its made to be with 3.73-3.08