I’ll agree with the previous responses in that the Isky 301300 cam is both way too much duration and the lobe centerline is too narrow.  As a general rule, you do not want the camshaft for a street driven blower application to be less than 110° and that’s for those applications where the boost is not being applied very often.  A 110° lobe centerline will give a better low end response when not in 'boost' mode but will have more 'blow thru' when under boost.  112-114° lobe centers are typical for blown applications.

Lorena, Texas (South of Waco)

I would use a wide LSA with a blower, preferably 114. Also you want to minimize overlap. It make no sense to have both valves open while building pressure. 

This is an opinion, but I think that is a lot more duration than you need for your blower motor, and also I would put it on a 112 lobe separation, not 108....  Take a look at the specs on the 57 Ford factory blower cam and see if you can find a cam close to that

I am currently in the process of building a 60 over 292 with a Ybloke manifold and 471. It’s time to select a cam for it. Will be going in my model A hot rod with a 5 speed teemed and 336 gears. Will see no track time just for buzzing around the street. Just talked to Isky and they recommended 301300 grind. What do you think have built and driven Yblocks for close to 50 years but never a blower motor. MIKE

Mike, still lovin his 57 t'bird after 53 years!