howdy folks... i just scored a very clean, low hours 5hp briggs i/c at a yard sale for $20... i want to strip it down to the bare bones to make it look like it belongs on a vintage bike... i won't be using the shroud, low oil switch, governor, pull start, or any other non essential parts... my question is how much can i shave off the block, head, and fly wheel fin-wise without compromising cooling... has anyone 'vintaged' up an i/c motor before? pics?