I�ve driven the Jeep 1,000 miles now. Had a problem about 400 miles in, burnt a valve. I thought it was running lean so I installed a wideband sensor to tell for sure and for the most part I really wasn�t. I actually think the spark plugs were too long, I was running 1/2� reach plugs but with the higher lift cam I actually had 2 spark plugs barely touching the valves and I think it was causing the problem, I pulled it back apart and fixed the valve and also went back the 3/8 plugs and so far no problem. I�ve been messing with the jetting quite a bit but needed more air correction jets for the Weber so I�m currently waiting on those. I will say the Jeep is a goer though, at least for an old Jeep flathead.