Cheepy Three-Sixty build

Marcohotrod said

great info! can you tell us more about the mods needed on the distrib. etc. would not both setups have the same amount of advance at peak horse rpm? you can borrow my 625 AVS but I do not think a smaller carb will help peak horse. maybe a thinner oil and HP1 filter, what u running? maybe that small cam will like 1.6 rockers, but we have never gained much going up on ratio when the cam is "right"

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Basically I removed the "shutter wheel" from the Mag distributor and machined up a new 8 window shutter and epoxied it back where the old one was. Then I looked up a schematic to find the ground/+8V reference/trigger inputs and wired them into the 6530. Both setups should have the same amount of advance at X rpm but that is not all there is to it.
You want to give any engine enough spark lead to light the charge at JUST the right time. Too early(advance) and you are performing negative work (reduced power) too late (retarded) and the charge doesn't get a chance to burn long enough and gets exhausted before it has consumed all there is in the chamber (again reduced power). Providing an engine with just the right ignition curve allows better/optimum transfer of power to the crankshaft. J.Rob