Those are all very nice however you may want to try a BLP main body from Dominic at Thumper carbs. You won't be disappointed. The BLP is the ultimate 4150 main body.
I've asked for before & after test data on like-for-like venturi size & booster config comparing the BLP BX4 main body against the "traditional" HP-type 4150 main body, but have yet to see any.
I've seen the claims by the carb builders using that style of main body. It's pretty simple IMO: if they ET & MPH better than properly-tuned carbs of the same config that use HP-style main bodies, that would tell me there's something to the design.
Do they look cool? Yep.
Do they look like they "should" be an improvement vs the older style designs? Yep
Have I seen anything "real world" to justify making the switch? Still waiting...
