I have a 4.150 stroke 440 block stroker motor with a set of 440 Source CNC ported heads in my shop now that broke a exhaust valve guide bottom off and drop some of the debris into the combustion chamber shock NOT GOOD down
The same customer had another different bracket motor that he broke a exhaust valve off a new set of the non ported 440 Source heads in the water box doing a uncontrolled burn out so keep that in mind work
There are some people who can screw up a 5 ton wrecking ball in a sand box with no tools, other than themselves whistling grin

Last edited by Cab_Burge; 07/28/17 02:23 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)