there are MANY independent cam grinders out there and lots of opinions on what to use for lobes on a specific camshaft. In the mid 60's when the 289 came out 108*s was THE LSA to use. Contrary to what many magazines say , 108*lsa will produce a strong torque curve from 2500-5500 depending on the amount of duration. Ford's famous LeMans cam has a 107*lsa and is the result on MUCH testing in the day by Ford engineers. I counted thirty different "engineering " varieties in the Ford experimental engineering book I have of the same basic cam lobes on development cams for LeMans. That cam DOES have a "peaky" torque curve and not a lot of bottom end torque because of it's mid 250's duration at .050 which also allows it to rev to 8,000.
When choosing a camshaft nowdays , it is really important to consider the airflow of "modern" heads , the amount of cubic inches in the engine and the "realistic" operating range of the engine. Not "every" engine needs a custom cam bu there are "many" that benefit from them.
'66 GT350H-3 time cover car - Car Craft July'77,Modified Mustangs and Fords Feb2011 ( w/article), Mustang Monthly June 2014. Bracket raced by me for the last 44 years. Yes it is a real one.
'68.5 R code GT fastback
'67 Ranchero 408W -427 glass hood
'78 F350 "Oleynik" car hauler
Ford Experimental parts collector