Timing tips

What numbers are most useful to you on the cam specs? I've got the cam card here. The short version is 267/275 intake/exhaust duration and 0.549/0.536 lift intake/exhaust. LSA is 110 as it turns out. It says 4 degrees of advance ground in. 106 intake centerline and 114 exhaust.

From my understanding it was about the biggest cam you can use with "stock" springs and pistons. It doesn't have much for vacuum and idles around 50-60% load (which is basically 50-60 kPa absolute pressure, where 103 kPa is WOT).

Cruise rpm in 6th is around 1600 at 70 mph, down in 5th I think it's more like 2000 or maybe 2200. It will cruise in 5th okay, though you might just feel a shake if you hit a big enough hill. It used to run just fine with the old MSD, and I'm trying to figure out how much advance it was running. Looks like it was maybe a hair over 20 at the same place in the map that mine is today, so I'm fairly sure that's my problem, but it's just tough since that's also right on the edge of "WOT" in a way, just at super low rpm. Though I wonder if I push the advance up I might be able to drop the throttle some and bring it more into line.

The more I look at the "factory" timing tables, the more skeptical I am that they can be taken at face value. I know some of the old Dodge computers had layer and layers of tables and modifiers, so the final actual number for something like injector time may have very little to do with the actual number in a table from the start. The factory values seem so different from anything like the stock MSD curve or the EFISource tables, so I'm beginning to think maybe I should try one of those tables first. The MSD table tops out at around 18 degrees of timing WOT, which feels about right for my 87 octane setup. I'll have to transfer the curves on it to table format and see how it compares across the full range.