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...Indy low deck tunnel ram for my 511" 400 based stroker... I am going to run two annular 1050 CFM QuickFuel 4150 carbs 
 If it were me...Those QF 1050 cfm 4150's will flow more than the older style 1050 Holleys. I would just put a pair of annular 750's IF YOU MUST run 4150's. Or just a set of the older 4500's. There is a guy on here occasionally (MONTESSA) that runs 440-1's on a 572" he was making pretty near 950 HP with 2 750 4150's.
I am going to follow your advice there and test with some 650's and 750's on the dyno. If I didn't already have one 1050 that is running on the car and one that fell in my lap I'd skip the idea altogether. I'd hate to have parts laying around and not try them. My QF 1050-AN runs so nice on the street I'd hate to let it go.
If I could find a set of affordable aluminum 4500 series carbs I'd give it a shot but so far nothing has surfaced. Long ago I made a vow to never own a pot metal carb again for a wide array of reasons.
Them 1050's will not be too much on that 511,make sure which ever carbs. you run block the power valves Tunnels Rams do not work with them.You may have to play with the jetting a little more than the 750's but in the end it will be worth it,the dyno will show it as well.I have been running Tunnel-Rams since the 80's,done it at 1st for the looks but would not have kept running them if they were not better.
I still think the 4150-4500 adapter plates will give you an easy 25-30 HP(the ones like in Mr_Cab photo)or more than just the standard top.
"To Be The Man'You Have Got To Beat The Man"
"T/D and Pro-Bracket Racer"
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