I run my distributor at 34 degrees locked, as in no mechanical timing, and it starts right up hot or cold no problem. I had to run it locked due to 108 LSA cam and 2500 stall converter. It surged in gear when I had it at 21 initial and 34 total. 10.3:1 compression eddie heads stroker small block. Drives nice, smooth, and quiet at low rpms too. Oh, and its a Mallory Unilite very easy to lock or set the curve any way you want. No external box either.