I have a BBf 602 cube, c headed, motorsport intake, stock 1250 holley that had a nitrous cam in it, roush/yates removed it and installed a hp roller cam, intake 861 exh 839. 114 intake centerline, duration @ .050 intake 285 exh 308. - 4.6150 bore 4.5000 stroke it made 1090 hp @7100 rpm 867 torque @6000
You'll need to go to the tall deck block........11.700" to go to 700" and beyond. 5.25" or more stroke.
Your heads will work as long as you stay with the 4.900" bore spacing.
No, probably the max with a stock type block is 572" (4.5 x 4.5) if you can even find one & get it to bore 4.50".
Not counting deck plates to make a taller deck stock block which may not be worth the trouble and alot of work.
The SVO block he has will go to a 605" with a 4.5" stroke, 635" with a 4.75" stroke.
With the Eliminator block and 4.75 stroke and 4.7 bore, you get 660 cu in. But you get a really short piston when using a 4.75 crank in a 10.3 deck block, kinda hard on piston skirts.
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