[Cloggie]

OK guys thanks for all the input.

I educated myself yesterday via some reading, some YouTube and am a little smarter than I was.

Alpha-N is a bit of a misnomer, all it means is that throttle position is the key determinant for the proxy for engine load, versus MAP as we have been discussing.
Also, if I believe High Performance Academy, ITB's literally flow close to atmospheric at anything past 30% open and from that point forward, the MAP signal is more or less irrelevant as a proxy for engine load.
Everything I used to educate me suggested Alpha-N - in most cases only Alta-N for ITB's, but in some using MAP at small throttle openings blending into Alpha - N.

Recommendation seems to be to have very small increments on the load (throttle position) axis, with perhaps 6-8 rows covering from 0 to 20% and then another 6-8 rows covering 20% to WOT. with MAP being optional.

So, considering first of all that I have all the equipment to to MAP or Alpha-N and have already set up manual throttle linkage, my first step is to make use, as was suggested, to use MAP at very small throttle openings blending into Alpha-N higher up and see how that works. It certainly ought to be good enough to get me through the break in period and get some miles on the engine to see how it behaves and idles.
I was planning on using small hoses - equal length - from the ITB ports to the manifold - I think mine are 2.5 mm and have some open cell air filter foam lying around that I could use to help act as a damper in the manifold. Good idea Showdown!

If it idles acceptably - and yes we will use ignition timing to help the idle and with the AC - then all is well.

If I am not happy, next step is to do the e-throttles. Yes, it'd be a little bit of a project, but like I said, the engine will likely have to come out at least once and I do all my own fab work, so worst case I just remake some stuff or 3D print it up and there we go. I am retired after all.

I am digging into Motec software this weekend and ought to be a little smarter on that, if nothing else to make sure I can make informed decisions on what my tuner is recommending.

This thread and the contributions from you lot have been immensely helpful and informative - thank you all.

D.