Great Crank Debate

[cobrajam]

I have the following cranks at my disposal to go in an Alum 427 Shelby block. I will be using a Dove tunnelwedge 4V intake, Stage III Edelbrock ported heads, 12.5:1 compression Wiseco pistons, most likely a Comp Roller Cam .730/.750 lift, aluminum flywheel, lightweight clutch assembly, Romac steel/alum lightweight balancer and plan to spin to 7500rpm. All are .010/.010 and 3.78 stroke. If the pic posts properly, they are from left to right:
64lb cast 390 truck 2U crank that has been lightened a couple of pounds by smoothing all the casting lines, removing the irregularities, and polishing the throws. Could ultimately remove another 5-10lbs.
74lb forged steel C5AE-C crossdrilled crank w/ the press-in type plugs.
65lb forged steel 391FT D2TE-EA crank, that has the snout and flywheel flange machined to work in a FE, at least 10lbs was removed by lightening and knife edging the throws.
Not pictured, a 64lb cast 427 crank with the grooved mains.

I am trying to build an FE that runs almost like an electric motor, as in a light rotating assembly. Would like an opinion on which crank you think would work best and why. In addition, looking for strong lightweight connecting rods that weigh in the 750gram range. I have some aftermarket I-beams w/ARP 2000 bolts that weigh 800grams, is there anyway weight can be safety removed from them.