Ok, the car does not look bad at all. As has already been mentioned the 60' and the ET are pretty much right on the money as they should be.
I also agree that the front end to me looks too stiff. You could possibly use a touch more of what is now called antisquat but not much. You can likely get that just by loosening the shock a couple of clicks on the extension. That front end does look like too stiff of springs/too stif of shocks/ or no travel with it too much limited by limiters.
You will not like what I see as your main issue though. You are trying to run that thing at too low of rpm. You are severely limiting any horsepower making it wants to do. You are working the engine harder by restritcting the rpm to ranges it is in the highest destructive harmonics ranges, and likely holding it down just when it may want to start running. Turn that baby loose and let it eat dude.
Is that cam advanced much? I would want to retard it some It is not enough cam for your car or engine. It is usable though.
You can mount a good strong cross member at any place in the car where you find frame strength. Then brace it with triangulations. The chute should be tethered (Attached) no higher than the camshaft ht, and no lower than the crankshaft ht at the lowest. Too high will possibly unload front suspension and too low will definetly unload rear suspension. When you do put a chute on it, Keep your foot hard on the pedal when you pull the chute. Only let off the pedal when you feel the chute hit or if it doesn't hit. You will get used to how long it takes to hit after the first two or three pulls. When you get used to it, you will be pulling the chute just before the finish line.
Ed