This has also been my plan for a number of years. It should be very close and doable, If you study the Australian 250 2V Heads Intake Port layout and compare them to the US Logs Intake they seem to be very close on the intake ports especially on the 1968 and older Log Heads as the Port Shape matches more closely to the Austrian and the C.I. / V.I. aluminum Head Intakes. The Exhaust port spacing is exactly the same for all the Log Heads as well as the Australian 2V Heads and I think also the Brazilian Heads. as a side note the first Logectomy's were done some time in late 1959 or early 1960, to some of the Ford 144 Small Six engines used in certain racing classes after their logs were cut off they were fitted with Hillborn Mechanical Fuel Injection set up.I've often wondered (very dangerous) make a home made 250 2v. Do a logectomy, a little porting, weld a 3/8" gasket matched steel plate to the cleaned up head and use a factory 250 2v 2bl intake.
How close is the port spacing between a log head and a 250 2v??