22-05-2018, 09:21 PM
A 1929 block will fit a 1933 crankcase, but there are a few differences. Flanged valve guides are a smaller od than the straight type, so not interchangeable. The valve chest cover is not interchangeable as the fixings are in a different position. The core plugs are probably the earlier screw-in type, not knock-in as in 1933. None of these things are a problem, save for originality's sake.Looking at your photos, you might simply get away with tapping the water branch fixings to 3/8 bsf and using stepped studs (the usual suppliers will probably have these - stepped head studs would do). If the bores are really 2.235/7, you will probably need to re-bore and you should check if liners have been fitted previously - may not be advisable to bore these any larger.