Gold Lifetime Member
Join Date: Oct 2008
Location: Central Washington
Re: MSD Box
Yes to your last question It has a tach output. With a crate motor I would not run a box, I don't think its necessary. I had one on a 400+hp motor in a 69 with 4:11 gears and I don't think it made any difference. It was just something to look cool and more wires to clutter up the engine bay IMO. The only reason I would use one is in a manual car that you want to add a rev limiter to but most newer MSD distributors have that built in now.
68 RS Coupe 355/350 TH, Detroit Speed, Hotchkis, Vintage Air, 8.5" 3.42 posi 10-bolt, MagnaFlow 2 1/2" exhaust, etc.
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