Thread:

620 cube chevy

OK I have a Dart tall deck that I am building and I have got to get some heads and tunnel ram for it and I have been told that the Dart pro2 380cc heads and tunnel ram is to big for a 620 with 10-2 compression pistons so my ? is what will work well in a TX-19 jet with a dom pump with a A/B hi-helix impeller I have two 800 holley 4150s cam is a 4-7 swap with 114 center line with high lift low duration custom grind from comp cams for jet boats with 600 plus cubes THANKS JD

Originally Posted by badjet

OK I have a Dart tall deck that I am building and I have got to get some heads and tunnel ram for it and I have been told that the Dart pro2 380cc heads and tunnel ram is to big for a 620 with 10-2 compression pistons so my ? is what will work well in a TX-19 jet with a dom pump with a A/B hi-helix impeller I have two 800 holley 4150s cam is a 4-7 swap with 114 center line with high lift low duration custom grind from comp cams for jet boats with 600 plus cubes THANKS JD

Hell, I would say that that head is not to big in general, however the BB3 Brodix may be a better choice. Of course the RPM range of your engine will determine the head size as well. Do you have a Max RPM in mind? Why did they do a 114 cam? It would be helpful to have the cam specs for this question to be answered properly.

Thanks

Alexi