What is really important is the finial compression ratio. If you start with a higher static pressure you ask the motor to do more work, and the blower, does not work as hard.
If you start with a low static pressure you are asking more of the blower. Not a problem just a different way to look at it.
671 is a smallish blower which might need some help ......
Compression wants to be high. the way you get there is an argument. I like running static pressure low and let the blower do the work to increase you compression. finial compression of 18:1 might be a little low.
cam is important, however if there is not a bunch of over lap between intake and exhaust, you can try it out. You will want to change the cam at some point.
I do it all the time, do not use the share link, copy the whole link from the address bar. Just copy and paste. do not use attachments as those work for pictures..