Rocket Power!
As we mentioned earlier, the cylinder heads are Edelbrock's aluminum units for Oldsmobiles (PN 6051). As delivered, the heads feature 77cc chambers, 188cc intake ports, and 106cc raised-floor exhaust ports. After DMR is finished with them, they will have smaller 65-70cc chambers, and the ports will have been reworked to deliver 315 cfm on the intake side and 218 cfm on the exhausts. This is measured at 28 inches of water on the flowbench. Normally, Dick takes the time to port his own heads, but this time, he's calling in the artillery.
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