Need some help with my engine as I had it rebuilt last year and since then have pulled it 2 times more with it presently at the engine builders. My issue is that I am puffing oil and burning it with oil leaks that I have found and corrected. I am running Kendall GT comp oil 20W50 with ZDDP in it for my flat tappet cam. My engine is a mild build, 30 over, mild comp cam 12-234-2 212*-218* @.050, roller rockers, Edelbrock EPS intake & Edelbrock 1406 600CFM. The engine runs strong with 170 PSI compression on all 8 cylinders. Timing on stock HEI was 12 static, 13 VA & 21 Mech. The engine when it was running had a coolant temp of 160-170* as I have a 2 core rad with rebuilt original water pump & 195* T-stat. Was wondering if the oil I'm using is too thick as it looks to me from the valves & pistons that there is a ton of deposit of hard carbon and tan discoloration on top of the pistons, with the valves having a sticky black deposit on the top of the valve. The engine builders are saying that is waaaaay too much fuel, go figure. Have uploaded photo's for a better idea of what's going on. Not happy about the multiple pulling of the motor, would like this to be the final time as I would just like to drive it. Thanks in advance for any comments or advice as I've been following this site for some time and have found the advice here is #1 with lot's of knowledgeable people.