Whats the difference ? 4150 question !

Jeremiah said
I ran an 800 (4780) main body with a 1.75" (850) base plate for years. It worked well on my .557 cam stock stroke 440 way back when there were no "950" carbs.

If it was me I'd just find a Holley 850 and try that. in my experience QuickFuel and even the newer Holley HP carbs most often take a fair amount of work to get them calibrated to have good WOT AFR and street manners.

Thanks, I was looking at Holley's track 850 purple because it's purple lol. I'm more of a do it myself guy. The 830 hp is mostly exact to 850 specs except for 1.75 base plate & the adapter is .700 thick which I think would make better velocity. If this doesn't work I'll build my dominator. My car most likely will see no street use