I finally found a way post my pics of the 241's currently on my truck.Lets see you diy guys post some pics too.Share some tricks & tips on how you port if you have any.
My job was started with carbide tip for steel at low rpm probably 1000 or so.Then i went on to use standerd tapperd cartrige rolls from 80 to 180 in steps.The next set i do will have more pics and better explaination.I really didnt spend much time with these heads maybe 30-40 hrs with assembly and all so bare with me.

 

243's





2/3 done
carbide bits with degreaser

1/4 die grinder for bit parts and 1/8 grinder for tight spots- both with variable speeds

 

Electric right?
I used a straight makita 1/4 grinder gonna combo'n the dremel next time for the tight spots.
Btw. Lookin good.Also dont be afraid to get in the guides.
You blended the seats looks like it?

 

How do you know how much material to take off? I have a set of 317's I wouldnt mind trying it on.