Just considering my options. They may be closing the local race track here so I may need to find a new use for my race motor. Thinking a polished 6-71 sure would look good on the street. Motor is a sbc .020 over, forged eagle crank and H beam 6"rods. Problem is my heads are the 49 cc darts. Intake runners are also 215 cc, not good for street. With dished pistons and 4.200" bore .80" thick head gaskets I think I can get the compression ratio down to 9. That is low enough isn't it? Are those 215 cc intake runners going to be a problem even with the blower?