I had the same problem. I used a cam bearing rem/inst tool, to remove and reinstall the bearings, hoping one was cocked a little, but the cam was still too tight. Eventually I cut a groove in an old cam and worked the bearings until the cam would rotate. I was worried about it at the time, but five years and over 850 passes later, I dont worry about it anymore. My engine made the fastest pass ever last fall, towards the end of the season. Its still going strong even though I had to hog-out the cam bearings...
Take the tool to it again...
Next time I'll check it before I bring the block home from the machine shop, as long as I dont forget again...
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1969 Firebird, Tx3-455/468 machined by CVMS
E-heads by Dave Wilcox/Comp Cams 300B-6 flat solid
850DP on E-85 by Eric Niefert/T2 1" plastic spacer
T-400/PTC 4000/390's/30x9 Hoosier radial slicks,#3400
1.38 60' 6.32 @ 108 MPH at Northeast Dragway NC 5/23/15 (9th pass on new engine)
https://m.youtube.com/watch?v=ePCu2v...ature=youtu.be
1.37 60' 6.26 @ 109 half track, 9.86 @ 136 1/4 mile, #3350 11/26/16 at Richmond Dragway (125th pass on new engine)
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