Thanks to Knukkel
I was able to borrow a knucklehead engine for a while!
I will take it apart, measure and model all the parts in CAD,
and then put it back together again...
sheetmetal that covers the rockers is held in place by the valveguides.
I dug up a piece of pipe and a few washers from the scrap iron
and fabricated a little puller to remove the valveguides without
damaging them. Worked like a charm!
that the head was stripped as far as possible I could start
measuring. I used a granite surface plate, a digital height
gage, various digital calipers and a digital angle tool.For
me the CAD modelling itself is relatively easy, the challenge
is in getting all the measurements correct!
Progress sofar, in 30 hours total, including disassembly and measuring.