Valve springs came in today finally. LS6 blue GMPP. good for .570" Parents are coming out for a visit tomorrow so I won't really be able to work on it till Monday.
Did some mild porting on the heads to clean up the rough casting. and ported the TB out. I Also a mild port on the exhaust manifolds.
My first time doing this (head porting) but I'm pretty happy with it. I didn't go heavy and just kept the tool moving. Felt like I was shading with a pencil. There was a ridge above the intake valve that I got rid of.
I'm not comfortable completely hogging them out if I can't measure it. I may pick up a set of junk/stock heads to practice on.
I didn't get into the port above the valve seat much because I didn't want to nick the valve seat. I hit everything with an 80gt flap wheel after. Port is still a little dirty above where the valve would be.. I went over it with the flap wheel to get rid of the remaining baked on crap.
Lapped the valves. Exhaust valve seats were pretty bad.
First pass
three passes taking more time. (finish coat of 15-40... I'm a diesel tech so it's prevalent here..)
