I'm kinda new on here, I'm Darren. Whats going on guys. 1978 Challenger 454/dominator just picked up for $3500. I would like to help if I can, quite a bit of the advice is great, I say power valves stay. I have spent countless hours on Westech dyno's from blown stuff to recreactional stuff. I started out reading plugs, the "ear" but now I take my carbs right to Jet performance in HB. If you have a good amount of info about whats in your motor ie; cam, comp, heads, impellor size, approx rpm, these guys have got me almost spot on every time I get my carb back. I realize their is guys that are pretty good tuners, I believe I am as well, but with the computer software these guys have they even enlarge a small orfice fuel passage just for jet boats. my own boat I just bought ran like crap, took them the carb and ditched the points for a DUI dist. and an oil change and had turn key 5 days in Parker! I just can't say enough about how well these guys have done me right. I hope this helps. Oh if you decide to try them 714 848-5500 ask for Johnnie. Good luck!

If the timing is ok, then you need to up the squirter size and or take the slack out of the acc pump arm.

I put the 35 in the front and the 31 in the rear and made a cam change and it runs great.  Thanks for the help