Head Porting basics

Like Justin mentioned, careful with the short turn and laying it back.

There was a pretty good porting story in one of the mopar mag not long ago.
http://www.popularhotrodding.com/en...dcore/0602em_cylinder_head_porting/index.html

Read about the "Venturi Effect" which will help with some understanding of the bowl area and valve seat relationships.

It's fun, dirty work on iron heads. Eye and breathing protection, good lighting are required. You'll smell rust for weeks and look like a rusting silo when taking a shower. Your shower will get trashed if not careful.

Here are the burs I buy from McMaster-Carr
1 4324A27 1 Each 1/4" Shank Extra-long Carbide Bur, Double Cut, Trade No. Sd-1l6, 1/4" Head Diameter
2 4324A24 1 Each 1/4" Shank Extra-long Carbide Bur, Double Cut, Trade No. Sc-1l6, 1/4" Head Diameter
3 4324A25 1 Each 1/4" Shank Extra-long Carbide Bur, Double Cut, Trade No. Sc-3l6, 3/8" Head Diameter
4 4324A32 1 Each 1/4" Shank Extra-long Carbide Bur, Double Cut, Trade No. Se-3l6, 3/8" Head Diameter