Good score on the Solexs, they look like Type Rs, and also look to be missing some bits. Also, Empi velocity stacks work well on these and theyr not expensive.
Yeah I hear the expensive parts bit, the P/S pump for my 26 is over 1k new lol. But its too bad, ive always wanted to see a NA RB in a Z lol.
But yeah I say keep the L, maybe stroke it? Not sure how badly it would limit the revs.