exhaust too loud

Those are Mind Train mufflers. I'd cut the old glass-pack mufflers off and weld a new set on. You could reuse your tips too. Back in the day, Mind Train sold inserts that would slip into the tips, to make things quieter. I'm sure something similar could be sourced. 

that's a good idea, I'll have to look for appropriate glass packs, and I have a welder. Those inserts they sold long ago were awful. I had a set but threw them out, they sounded like an old VW Beetle with all the hissing

We had customers with Mind Train that live in gated communities and uppide uppide 'exclusive' neighborhoods ( Jorge Bacardi is one) that got a ticket for noise! On WILLIAMS ISLAND no less, one of the highest priced zip codes in America, speed limit 30 mph! We had to quiet his '72 down.

That exhaust sound is to die for OMG everyone that hears that sound when we start a car here at the Pantera shop, wants that system. Problem was back in the day as they say, those inserts made 'em too quiet. Removing them? Don't even go there. They reusted in.

I put the back windows back in and it quieted the car down a lot (for me in the car) so maybe I'll just leave it be. The noise police is not getting after us yet, but they've got bigger problems than noise.