Tunnel ram or no tunnel ram...
I no longer want to use anything that isn’t made from billet. The APD sounds like the best deal, but if they use a cast Holley main body I wouldn’t use it.
The billet stuff is so much better and more accurate it’s not funny.
William Baldwin put a video on his YouTube page (it could have been his Facebook page now that I think about it…it was he one or the other) comparing a new main body against an older main body of the same size.
The new main body flowed less because the manufacturing tolerances weren’t as good.
If you get a quality made billet main body it won’t have those issues.
BTW, if you haven’t yet, look into twin blade carbs. I think Tony Morris is the actual guy who has the “rights” to manufacture twin blade stuff (last I knew there was some court stuff going on…don’t know if that’s cleared up yet) but I think they can make more power than a convention 4V carb.
I’ve only had one chance to tune on a pair of them and dang they are nice. Of course the pair I worked with were a mile off and I never got them totally unscrewed.
Hopefully next spring I can get the engine up here on the dyno and flog the crap out of it and get the carbs where they need to be.