Not seeing 302 cfm.
Out of the box.
.100=75cfm
.200=136cfm
.300=201cfm
.400=251cfm
.500=280cfm
.600=283cfm
.700=283cfm
.800=283cfm

Modified port and chamber
.04 removed from common wall from .15 behind intake face to behind headbolt buldge.
Raised roof .175 tapering to nothing right at the guide boss.
TF 2.08 X 8Mmm valve and 8 mm guide.
Widen comb. chamber to 4.06 and move back chamber on intake side
.100=80cfm
.200=151cfm
.300=219cfm
.400=263cfm
.500=291cfm
.600=293cfm
.700=290cfm
.800=290cfm

Still trying to tickle it's belly to get around 310 at .650
Valve job from TF was hanging off the edge of the valve on the supplied 2.02 valve.
Flow test was done with 2.08 valve and guide change with valve seat as it came from TF
seating on inside edge of 45 on 2.08 valve. So valve job to center seat in 45 will probably pick up 1 to 2%
A 2.055 valve would center the valve with valve job as shipped from TF

Not complaining. I think these are as good as the best ported eddys out there, out of the box. Plus with a different port entry plate as TF uses they may make 300cfm. Just posting what I have observed. Dan