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He is figuring to zing it 8500-8800 or so, he is hoping it has ENOUGH gear 
BTW that 735 ponies was with a 390 carb on it  ..it has a carb shop 950 on it now 
that dyno was done at Arringtons shop....
Scott took one of the heads off and had a guy pretty famous around these parts(Jerry Arnold)flow it, and it stopped just a smidgen short of 400cfm
Sounds like you have an old Busch/Truck motor (those 390's really flow over 600), with a restrictor plate cam, did you already dyno to 8800 rpm with that 248/258 cam?
That is what he has
Not sure on the dyno info i know that is what Arrington told him, but not sure about where it made what power at.
Will be interesting to see how it runs and how the convertor he has will work.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, low 10.30’s 1/4
1.41 best 60 foot
6.56 at 104.17
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