Here I am replying to my own mail... the other thing you could try is a
pair of 1.5" SUs. These are certainly quite common (MGBs, among others)
and should be fairly cheap. They'll bolt right up, and with a little
tuning should give you a few HP improvement (according to Ted
Schumacher, swapping from Stromberg to an equivalently jetted SU is
worth 3-4 HP), and then you can fiddle with needles to try to go from there.
Clearance may be a problem, again; the suggested solution is "slim" K&N
filters (which almost immediately want a richer needle, since they flow more
air).
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