The reason I say it won't do much better then a 15 is ,When i first started play with my 64 on the track the motor was stock other then a set of headers and a offey intake with a 600 holley 250 with a powerglide & 3:08 gears car, Ran mid 18s with the power glide then i went to a 3 speed sag. and ran mid 17s. Then i built my 250 with Much more compression & cam then what you have in mind.
And with the 3:08s still in the car it would run 15.15s(with a point dist.) all day long no matter time of day or weather. It wasn't untill i started making gear changes that i got the car into the low 14s.I built this motor 17yrs ago AND was a daily driver up untill 14 yrs ago so but the the I got the gears Need to just all out race it The motor was already showing it age Between raceing & driving so the best it ever laid down was a 14.3 @ 96 if the car sat more then 3 weeks the numbers would fall way off till after the 3rd pass the Bang right back to it's numbers. Now that I'm redoing the motor I found a few things that was on the way out ,Like the rings a broken cam retaining plate and one or two push rods with no ball on the ends.( HUM kinda funny HUH that this motor was still getting faster even though getting wore OUT) And it would just about have the front tires off the ground when leaving the line.So now i can't wait to get THIS new one all back together.

Here is a brake down On my New build up
13-1 compression full floating pistons stock rods cam spec. 691/680 lift dur @50 269/272
It will also have bolt in lumps But Not PES as many know i have been working on my own.
I have been doing flow testing Side by side with pes and I my own. First Tests i was 2cfm over pes then i made small change to the intake aproach and gained another 2cfm in which now put mine at 4cfm higher so I stopped at that time to bring them back to my shop To finish making the changes that I did at the machine where i was flowing this head. And just waiting on the guy who owns the shop To have time for me to get back in with out using his time up Or interrupting his normal business hrs. With each little change I have made I have Become closer To The braze in lump. The Final test on these lumps of mine are being done with a MIke Kirby Street preped head.
I'll be posting final numbers & info when i'm finshed.Then the Track Tests come next.

Hope this helps but not to confuseing.
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NovaMan/Twisted6/Larry


Larry/Twisted6
[oooooo] smile
Adding CFM adds boost smile
shocked God doesn't like ugly.