360 head trip

Well valve jobs is something I dont do and farm out to others.

Typically a 70/45/30 3 angle would work nice, but there are some who use 5 angles.
The top cut some do 'chamber side' would make a nice radius transition from the seat angle to the chamber but requires loweering/sinking the valve job some...[/QUOTE]

The Direct Connection Manual said to use a 70/45/15 degree 3 angle valve job on small block heads. They also say not to sink the valves past what is needed to get a good seat, centered on the valve face. 70 degrees was too much for my seat grinder and would "Bust" stones so I backed off to a 60 degree bottom cut. This worked very good for me, but I had a good teacher. It's nice to see you doing this in stages so people can see what they may be up for, and the benefits derived. Thanks...[/QUOTE]

If you us a bounce spring, your stone bill will be a lot less and still cut a 75* cut. I us a bounce spring with all cuts.
Super light cut with a bounce spring and it will survive. Do it all the time.

with out a bounce spring, stone gone in a blink of an eye.:mad:

The top cut, I'm kinda on the fence......
Up to 15* per cut the air will hold on. more then that and the air will jump. so 45*seat -15=30....not 15.

Now you need a good .100+ top cut to keep the air smooth going to the chamber and with a fresh seat that keep it up like chry recamends, you can't get it .100+ with a 30* SOOO, using a 15* cut would make a much Wider top cut. with out sinking the vavle.

Every time i make my top cut 15* it mess with upper lift flow.........mybe it just the way i port the head:dontknow: