If they did change the cam lobe profile when they built the Super H from the H,,,,
I would imagine that they would have done the same change they made to the cams they built for the SMTA, possibly the 54 models,,
Possibly stage 2 Super M's, 400 and 450, and if it had a left handed camshaft nut for ID purposes,,,
Anyways,,, On the changes they made to those cams,, they slowed the intake lobe timing down Almost overlapping the exhaust,,, but it built a condition in the cyl head in the intake ports, and also inside the cyl,,,
The valve stayed clesed long enough for the piston to start its downward travel to draw in the charge,,, Builds more vaccum inside the cyl when the intake valve openes,, Well it gets a little extra breath in,,,, stuffs more air in the cyl,,,
Ive had M cams read, and cams taken from original 450, and a SMTA that threw the cam gear and trashed the keyway and needed replaced,,,, and compared the two results on paper,,,, Even the new reproduction M-450 cams sold today are the same spec I found from the original 450 camshaft.
anyays again,,, if they changed the profile thats what you would have seen,, starting with the Super H.
Ive never had the H, SH 300 or 350 cams read to know the exact specs,, ( I have a cam from each engine now,,, to read em and record) Also owning a 53 Super H, a 54 Super H, 40 H, and a 52 H, and a PTO dyno,,, and way too much time on my hands,,,, well sir,, a good Super H is no slouch.
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