Not Ranked
Any good timing light should work with MSD box.
That being said, Demon carb replacing Holley carb makes a world of difference! Replaced Holley 700DP (4778) w/ Demon 650DP, and couldn't believe it was the same engine (351W, TFS/TW heads, CompCams hydraulic roller cam & rockers, Ede Perf RPM, MSD dist, 6A box, & plug wires.) Idles smooth, runs smooth, & accelerates like mad!
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