It's not cheap but it's complete and new from US Body. I had good luck with their race weight Hemi hood
https://usbody.com/product/1970-1972-dodge-dart-fiberglass-pro-front-end-race-weight/
I have a stock bore 340 at the machine shop going .030 over and have a Scat forged 416 kit going in. I'll use my Trick Flow heads and intake and the 850 carb. I have 4:56 gears now and also have 3:91's if the 4:56 are too steep for 1/4 mile. The build will end up at 10.4/1 so should be fine on...
I remember guys on here saying Holley had it wrong on power valves. Correct way is to measure vacuum at cruise RPM and divide that instead of idle. I'm sure somebody else with more experience will chime in. Here's an old thread on power valves...