Quote:
Originally Posted by Paul Precht
What type of block and what was it honed on, can you list the head flow.
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959 production 454 block
280 grit hone, looks funny wet with hone oil
820 head castings, SF 600 4.350 bore @ 28 inches, Intake flow
.200 156
.300 225
.400 276
.460 292
.500 301
.550 312
The 820 casting is down on flow compared to other GM oval port castings, but I had them so they were used.