got a guy at a machine shop with a serdi who says he will do a hot tanking, resurfacing and valve job for 180 bucks. i figured it would be a good idea to give him the type r valve job angles rather than have him conjur up something. anyone know what they are off the top of their head? pretty sure the first one is 65....

 

i dunno

but, in the best motoring videos they just say that the ports are buffed by hand, until they wanted to increase suction on the intake side and they developed a machine that did a better job and did it quicker

 

30-45-65 will work alright