I have had the SR's on my Cuda for the last 20 years, actually purchased thru World Products, when I worked at the speed shop here, had them ported, and he said they flowed 325cfm at .650 lift, Indy claimed .350 at the time, but that was at .800 lift, and Ken Lazzari said we were on the money with my set.
My car presently has a 493, SR's, .601/.608 solid roller, 10.5 compression, 950HP, 2" headers, Indy single plane, car weighs over 3800lbs, runs mid-10s footbraking. I feel there's more in it, but the convertor is really tight, and I am not a great tuner, may want a 1050 as well.
1970 'Cuda,Lime Light,499 Indy S/R's 10.70's @125,street driven ALOT!
1966 Barracuda 360,now a 5spd,Hemi Orange,Hot Rod Air,
New daily driver-2003 Ram 2500 Cummins 5.9
'69 Valiant 2-dr, sleeper!
New project---1938 Dodge truck, plan is a 360 with a A500, AC, Calvert rear susp., rack and pinion front with coils.
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