H5606

I bought two of these in blister packs from Northern Velocity back in '95 for what reason, I don't even remember and have yet to run them -

Questions here on the AME 0.8 .049 MkII w/o throttle while making some generalized assumptions but please set me straight if incorrect:

The muffler and spring starter are unnecessary and can be removed?
The venturi appears to be glued into the crankcase and is too big for fuel draw on suction, so how do you neck it down?
Is it better to run some kind of pressurized fuel system and leave the venturi alone?
The stock head and glow plug should at least be replaced with a Cox high compression glow head?
How to reduce diameter or fill the oversize hole on APC props to center them on the drive plate?
Should the crank be lapped regardless of how free it feels while turning over cold?
If this engine is set up properly, can it out turn an equivalent displacement Tee Dee on same prop and fuel?

Thanks for any pointers, wisdom, advice, or supplemental information -