@NeilM- If you can drop the heat requirement, then yeah, your spare 2276 (as long as it will run on pump gas) will be a blast in your Speedster. Depending on the combination/ how high it revs with power, a 1 1/2 or 1 5/8" exhaust (a number of guys here run the "sidewinder" style to keep everything compact) will be the right size. As I said before, make sure the chassis is set up (good shocks and anti-sway bars or camber compensator if the car is swingaxle) and it can stop. Do you know what caster shims are? (a hint- they're very important for predictable handling at above highway speeds (and maybe even at highway speeds depending on how the front was lowered).
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.
You must be running, what, somewhere around .125- .140" deck to make those heads live on the street? And while your last statement does have some merit, these are replicas (so you can really do anything you want), and if you've set it up to be the best driver possible then bigger really is better!
Unless you're copying a factory build who really gives a sh*t?
Yoda out (for now, but back you know I will be!)