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To provide spark, we procured a Digital E-Curve distributor from MSD. It's a billet aluminum small body unit that has a digital module inside so you can set the timing curve with two rotary dials. There are nearly 100 different advance curves available including a vacuum advance. There is also an adjustable rev limiter under the cap so there will be no need for an external box, but one can be used if you have other things tied to the ignition like a boost controller. Jeff referred to the instructions to find the proper position of the switches to give him a total of 32 degrees when added to the 20 initial timing he will be starting with. The engine will need more initial timing put into it because of the big overlap in the cam.