I use a Facet square red one, 2.5-3.5psi, it works just fine with both my 1360 (~125HP) and 1412 stroker (114HP). It's mounted on a Mini centre exhaust mount screwed to the subframe. This shuts it up good, can't hear it with engine running. These pumps are cheap and go just about forever.
Carby is a 45 Dellorto, no fuel pressure regulator needed.
Around $90 or so, Karcraft sells them too.
_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.
