I used a 4 inch aluminum cut off disk in a grinder. The one I used was slighty used to reduce the diameter a little. I cut wide if that makes sense. I then did some rough shaping with a file. Then i started to conture with a aluminum rotary burr. Now i am still trying to figure out how I am going to trim the runner divider!
Thanx 451 Guy
512 cu in 71 Demon Super Street Car - NO LONGER - Broke Crank Best ET 9.57 @ 139.96
451 cu in Pump Gas - 71 Demon Super Street Car Best ET 9.99 @ 136.80