Tunnel ram or no tunnel ram...

My numbers for RPM heads were:

.100 113

.200 181

.300 240

.400 280

.500 316

.600 328

.700 332

This was included 5 angle valve job and back cut valves. Of course max wedge intake port. I’ve seen 340 at .700 by people so this is nothing impressive. I was thinking about bigger intake but this never happened. I sold them.