Methanol Injection in NA Carbureted engines.

[JBraxton]

Hello, im wondering if anyone has any experience with methanol injection in NA carb'd VW applications. I know its not the textbook use-case, but my new motor has me considering it (90.5x84, FK8 Cam, 42x37 heavily ported heads and 44 IDF's). Its all put together on my bench with 10ish-1 compression,
which the machine shop that cast and ported the heads assures me is fine. Even so, a hot LA day and my inability to hear pinging still scares me, so I wouldn't mind methanol, onto the technical questions.

Kits and controllers exist (mostly for big V8's) that use a simple switch at WOT. Better then nothing, but not ideal, i'm not at WOT all that often.
I have seen some forum chatter about vacuum referenced methanol injection, but very little info, and i hear pulling a vac line from 44's is a mixed bag anyway.

There exists plenty of controllers that use MAP's and MAFs. I would be more then happy to plum a MAP into my manifold, but controllers tailored to MAP sensors seem to be only for Forced Induction? I cant seem to think of a good way to add a MAF sensor, as i don't want to add plenums/hats to my carbs. Would it be outrageous to place a MAF on the top half of the air filter housing? I cant find much info on the dynamics of MAF placement other then "after the filter". And finally, the most ideal sensor in terms of packaging around my existing system would be a LAMBDA sensor, but I don't know enough about
sensors of this nature to know if that makes sense, and i have not seen any controllers advertise the ability to reference a lambda sensor. I have decided not to even think about the injection/application side of this problem, until i can confirm there's a senor/controller application that could works. any advice appreciated. Thanks!