37 221 valve stem length too long? Help.

[Mark's 37]

I started to mock up the valve train this morning. The valves are too long to use (significantly). I have a stock grind 37 camshaft, Johnson style adjustable lifters and the valves are SBC style. The length of the valve is 4.916" and the adjuster will not thread down far enough to set the lash. The adjuster bolt on the lifter is bottomed out. It seems I will need to have the valve stems ground to make the fit. Can this be done or what are the other options?