I have a '63 VW pan. My 2276 doesn't seem to overwhelm the chassis. I will follow up in six more months however
Again, no heater for me. Web 86b, 105 LSA, 42/37.5 valves on 040 heads. My deck height is not 'optimal' but I had 45cc heads to work with. I have no issues with low end response, overheating and driveabiliry
I do think a smaller motor would be more in the spirit of what these cars were designed to run with the available technology back in the day.
The Webcam 86B is intended for 1.4 or 1.5 rockers. If it was my car, I'd put 1.5 rockers on it. If those heads breathe well you can up the compression to 10:1 with no problem on 93 octane, as the dynamic compression numbers will be good with the large lift and duration.
I run the Web 86B with Pauter 1.5s in a 2165cc, and it pulls to 6500. I'm running 10.2:1 static with no pinging, but an accurate ignition system and jetting are crucial. I'm running just under .040" deck height with 52cc chambers. Valves are 44 x 37.5 on seriously massaged(welded and relocated plugs and welded intake ports and manifolds) 040 castings. Yours should be similar, you'd be at 10.1:1 with .100" deck height and the numbers you provided.
Agreed about third gear runs, with my 3.44 R&P I'm really moving along close to redline. It is hard to pay attention to power levels when the world is going by around 100mph.......