Slant plug heads

[motorhedfred]

Can anyone tell me what the center to center distance is on the slant plug head for the various china girl engines ? I'm wanting a starting point for heads on a 4-stroke atmospheric intake v-twin project I'm starting.

http://motorbicycling.com/f37/compressor-pump-engine-35225.html

Thanks,

MHF

 

[motorhedfred]

I should clarify my question....I meant the center to center of the head bolts.

MHF

 

[Al.Fisherman]

With the head bolts installed and using 8mm studs, the outside to outside is 53.5mm