Andrews 37H Cams

I have been looking around for a great cam and priced affordable. I have family use Andrews Cams and were very happy with the results that they produced. I been looking and been looking at the 37H cams. I was wondering if anyone has any experince with these cams and did they use the crankshaft sprocket with +4 or -4 degrees timing change.
Any input is good about any other cams also
 
I have 31's in my motor which are the same cam with all the timing events rolled a little later....I think the 37's are great for 95" or 96" motors, and the 31's are better for 103's....Here is a link to a shop that uses nothing but 31's, 37's, and 50's in ALL their street motors...

http://www.johnsonenginetechnology.com/index.html
 
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