Johnny,
Since you said that the valves were burned you might double check this:
Maybe someone used the Model A camshaft Exhaust valve clearances in the past.
The original B cam and lifters requires .015 intake
and
.022 on exhaust as noted on the link that Vince Falter(
www.fordgarage) posted above.
http://www.fordgarage.com/pages/camshaftspecs.htm
In yellow table:
Intake Valve Design Clearance is .015
Exhaust Valve Design Clearance is .
022