Cool ideas, I think for some more you could look @ Sarge's white '63 Bug, from the DKP 1 days. I believe he ran a number of 88mm motors, some with stock crank, some with welded strokers or SPG roller
A friend of mine, here on Lounge has a nice complete set of Solex 40PII's for sale at a great price. I think you'd need linkage, and to fit the era you're building, an old Berg setup would be perfect.
I think around 1969, the cream of the crop guys were blessed with Type 3 dual ports, but I bet it was mostly the racecars that ran them. I know at one time Sarge ran a 1700 with 110 Engle and Solex 40PII's wit parabolic tall stacks. Somewhere there are some pics of his car equipped as such.
I think I'd build a 88 x 74 dual port, use single 32NDIX Zenith or Bug Spray Holley, original 40HP stale air shroud, 6V generator, Santana power pulley, 010 Bosch, oem style wires (not newer silicone stuff), Bosch orig coil, use the black intake boots, brown Bremi dist cap, keep tin all satin black, maybe have the generator backing plate chromed, maybe polished aluminum sheeting for firewall. Try to find an old Cyclone header or an old Four Tuned glasspack header.
For the guts of the motor, 88 x 74 welded crank, stock rods (clearanced), try to find a period case in good shape (H would be small oil galley, B cases are notorious from cracking up the front, AE- weren't around until 1971-), Engle 110 cam, CR to suit today's urine-fuel, stock VW rockers with 911 adjusters, Norris springs, retainers, dual port heads gone over to 40 x 32mm, ported like HP book, see if you can find a Crown 6lb flywheel. Use stock fuel pump, maybe mount coil on firewall, see if you can find some period race part decals to stick on shroud or firewall (see pic somewhere of Ron Fleming's black oval showing motor, valvoline and NGK decals on apron?) Run breather hose off oil filler down to the ground, through pulley tin.
Keep front end stock height and run no bumpers, just open grommets where brackets would be. Tall, rounded-sidewall radials are a must, not squared off, flat treaded modern tires. The Vredsteins or old Pirell radials would suit. Paint drums red or some other VHT color.
next, go photograph it in a field of buttercups or under some old oak tree somewhere.
A re-enactment of the DKP guys parked in front of San Diego zoo would be cool too.
Have fun,