My SBF 347 stroker is running 10.3/1 compression with a Comp Cam w/valve timing @ .050 intake 4btdc/40abdc; exhaust 51bbdc/-1atdc installed @ 108.o intake centerline and duration @ .050 intake 224, exhaust 230, lobe separation 112.0. On the chassis dyno we were getting a bit of high rpm "flutter" and the total timing was 28degrees. Bumped it to 36 degrees and smoothed out. My tuner was hesitant to go as high as 36 degrees, and the plugs after that run had the heat mark well around the bend toward the base of the electrode which seemed to point to the timing being about right. On some SBF forums I have seen total timing as high as 40 degrees, but they also had a bit more cam. Any thoughts on where my total timing should land based on my specs?? Just back checking my tuner's thoughts this morning.