Thinking today while I was sandblasting if it could or has been done. Got the basic how to thought out, so just wondering?
The split valve guides are the thing to get away from.
I am sure most model A Fords and a lot of V8 motors before '54 are going together with modern, straight, one piece guides.
I just finished a Russian model B last week and I pressed in modern one-piece guides.
The last T engine I did this winter also got the same valves and guides from an early OHV Ford 6. I think a 232? 223?
The Model A/B engines we have done at the shop have been getting the split guides. We have the one piece sets in stock and of the 3 sets we have had for over 2 years, I think we have sold one. Other shops may have a different experience.
Because the split guides are a slip fit I was thinking they could be replaced more easily in a home shop then the press in type.
With the work that is involved with opening the hole and spot facing each one for the A/B type guide I would go with the press in type myself.
I have only used probably 2 sets of split guides and mushroom valves in 10 years. I only use one piece guides and oversize intakes on all the A's I rebuild. I probably do 30 a year.