Convert2.1 DJ engine to aircooled

[Sunroof53]

I really wanted to give this a go but those eccentric head studs are putting me off , also going back to 8mm studs .When i saw the eccentric head studs i wondered if the head could be slotted but i suppose they already tried that?? .
The plus for me would be an ally case and not to use a type 1 case as that was one reason i built a type 4 .No mention of tinware .If there is 12mm of jacket left on the case ,type 1 tins aint gonna fit so i am back in the realms of making tinware.
I'll do some more searching for completed engines .

Thanks