Slant 6 Turbo 68Dart Project
I also may go get myself a HEI unit and experiment with that very shortly. I like the idea of putting it inside a Mopar ECU box, but I have a Mallory box i might strip out and use. It should fit a CPU heatsink and the unit nicely.
My un-asked-for advice... based on my
limited experience with my (similar) 10-pound engine, which has never shown the slightest indication of any sort of ignition of ignition failure, under boost or not under boost. It just has never "missed".... so far:prayer::prayer::prayer:
What I use is an OEM (refurbished by Cardone, from Rock Auto) slant six "lean burn" distributor that has a locked plate (factory) having neither a centrifugal advance mechanism nor a vacuum advance diaphragm, with the timing set (by me) at 18 degrees.
It is wired to an MSD 6-AL digital, but, non-programable, ignition module using no ballast resistor.
That's it.
The downside of this setup is, the gas mileage in
UNBELIEVEABLY BAD!!!
No way would it be workable for a street car. NO WAY.
The drivability, starting, and idle are flawless, which is hard to believe, but apparently a correct spark advance curve in not important unless you care about fuel economy.
And, of course, you do. I am thinking that the simple addition of a vacuum canister to give this distributor some vacuum advance MIGHT alter the spark event to the extent that some semblance of reasonable economy might be possible during cruise conditions. But, you'd probably need something on the order of a total of 48 degrees (or more,) to achieve good mileage. That would require 30 degrees of crank-measured advance, an amount I am not at all sure is possible with an OEM Mopar distributor. Do you know?
Anyway, the simplicity and low-cost of this setup is its appeal. Plus, it seems to work... at least, for me. The only significant cost is the MSD unit, which can be found on EBay for cheaper...
Food for thought in the K.I.S.S. vein...