I would consider starting with a different engine . the KT was not
very reliable in stock form & there are not any hi performance parts
available for them such as rods cranks ect. . it appears from
whatI've seen ovwer the years in twin cyl. flat heads you need more
cubes than the flat heads have . the PS/SS flat heads are at 50.5.
I'ld consider using the K582 twin if you want a flat head or check
the rules out with the club you pul with & look at one of the new OHV
twins . Lacota makes a fair amount of parts for these engines .
theres a link for them in the "bookmarks" in the sidebar to the left.
if you want to do traveling consider building a single . rules in the
pro stock class are very consitant from state to state & club to
club .