Has anyone ever ran one on a big comp, sb,400+ cube race motor? with w5 or 360-1 heads. I would like to hear about it if so. I have ran one on both combos, would like to compare with someone else.

I ran one on my 340 W-2....I had issues with valve
springs and the junk vac secondary carbs... with the
right set up they work great

440" w2 with holley pro dominator tunnel ram. 650+ hp and 590 tq

The first one I ran was on a 14.5comp, w5, 408ci, R block. The one I am currently running is a 360-1rp, 433ci, R3 combo. Neither want to pull into the 6,500 on up rpm much, both have or had large rollers and proper springs and such, current combo runs best shifted at 6,200. Nothing is the same on either motor besides the intake.

Car weighs 3,072 with the w5, r block combo, 727, went 9.55@139.99 best. New combo is 3,092 with r3, 360-1 combo, 727, has went 9.38@142.79. But..... Neither want to rev AT all.

I would have expected a much higher rpm.... at least
8000+ if the heads flow and the cam is big enough
EDIT
What do you call enough spring... whats the pressures

I expect it to want to pull good to 7500 or so, I guess I will try the Indy single 4bbl out that is converted to dom flange, about all I have left to try, maybe it is a conv issue??

W5 had 280 installed, 710 open, new motor has 340 installed, 820 open. Both are correct to coil bind also

408 SBM, 360-1 Raised port cnc heads, 10.4:1 compression, pump gas, 8100rpm, indy single 4bbl intake with 4150 flange 1000cfm carb. times in sig. 3100lb. race weight.

My old 422 w5 was done about 7400-7500 or so...... 273/280@50 roller.... Went 9.80's at 135 in a 3350 pound car with 727. Shifted it at 7 trapped about 7400.
Current owner shifts it at 7500. Went with bigger more aggressive roller, another point in compression( from 13 to 14 to 1) car has now been 9.62@ 140 weighing 3220.
It actually was quite done around 7500 at 422 inches, definately on the downward ramp power wise, with my smallish cam.

what converter and what rear gear/tire size?
....just curious as my 5800 stall 8" coupled with my 4.3 gears and 29.5 tall tire isn't doing me any favors. Converter is out at the moment getting bumped to 6K and I'm probably shopping for 4.88 gears.

I run 4.30 gears, 29.5tire, conv flashes 5,800 to 6. Mine would go faster with 4.10s, I cross at 7,250. It is pretty much done the second I shift it into 3rd it acts like.