Timing Dance ! Vacume Advance ?

dgc333 said

FWIW, I have had 600, 670, 725 and 750 cfm carbs on my 360. The butt dyno can't tell the difference between the 670, 725 or 750 on the top end, there was a noticeable but small difference with the 600 (but the car has run 13.7 @ 102 mph with a very traction limited 2.2 60' using the 600).

But there was a very dramatic improvement in the low and mid range throttle response with the 600 and 670 over the 725 or 750. Plus the 600 and 670 get approx 5 mpg more than the 750.

BTW, don't know if anyone saw HP TV this week end they got over ~420 HP on a sb Chevy 383 with a Holley 600.

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So I installed all the different metering rod combos I could get from the speed shop today and got it a little better but Im over it. Im going to see about a holly 750 my friend has and went to eddelbrock site for a performance 650 or 750. I have to ask one more crazy question and may post it. once I get the carb done , without changing compression is there any way to increase Horse Power. The motor is broke in, 360 cid ,9.5-1 comp, 489 lift cam eddy rpm manifold headman headers and flex fan. I want 300 hp at the wheels and Im at 275hp/300trq at wheels 1/4 mile 13.50 102mph. is that as good as it can get ?
Thanks for all the awesome advice !!!