Right, I forgot about that. Plus you're going to need one for the 122. Yeah, there are TONS in the yard and they're not that difficult to pull (for friends ONLY).
Jordan, I'm pretty out of the loop on MS as well. Frankly, I'm pretty tired of trying to keep up with all the stuff going on.
The code update is pretty easy, though a bit scary the first time. The later codes (starting with the original MSnS, I think) had a switch built in so that when you typed double exclamation points !! it would kick you into bootloader mode. That way you didn't have to open the case, jumper the jumper, and then power up hyperterminal & start loading. I tried Easytherm a couple times but it always failed, and HT has always been reliable for me so what the hell?
The B20 pulley will be the cheapest, I imagine. It's the least material, anyway... The B230 will be the most expensive - more material than both B23 and B20 combined, plus WAY more machining steps. We haven't been quoted yet on either B20 or B230. If the B23 EDIS adapter is $85 USD, I can see the B20 pulley being a bit less - less material but more machining. I'd be guessing wildly if I tried to estimate the B230 one, but I'm thinking it'll be no less than $100, probably closer to $120.
IMHO, getting an EDIS setup on the B20 will be easier than sourcing a '75 distributor and then adapting it to MSnS duty, and probably cheaper than adding a VR-based electronic ignition setup to an earlier dizzy, if they even exist.
Not that I'm trying to sour a sale, but you know that MSnS-Extra can accept the 60-2 input from your big heavy flywheel and fire a waste-spark coil setup like the EDIS system, right? It's a bit of work, and the EDIS is very elegant, but it's also a bit limited: You can't drop sparks at all, only retard the timing, so doing launch control, traction control, or rev limiting depends on how much timing your car wants. EDIS only gives you a range of control between 10*ATDC and 57*BTDC, and if you try and go outside of that, strange things happen.
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