Ran into this mocking up one of the first 427" Stroker 351 Windsor fords in the mid 90's, the combo used a 400M crank offset ground to 4.17" and the rod journals cut for mopar 340 rods. Wound up having the cam reground plus still massaging the shoulders of the bolts just a tad until I had .060" clearance.

A neat trick for mock-up is to wrap the lobe with a medium grade black (outdoor type) electrical "Zip-tie" or "Tie-Wrap" since they are almost exactly .060" thick. I also put in a Pete Jackson gear drive to eliminate the chance of chain stretch related problems down the road.

Patience is the key. It seemed frustrating at the time but I was building the Cobra so I knew fire-up was a long way off so I just "lived and learned". Since it was the first Coast High Performance stroker kit they sold so they comp'ed me some freebies (like fly-cutting my pistons for the new (at the time) Trick flow Windsor Heads, since I basically did most of their R&D for them.

I had known (from the old timers long ago) that a '5/8 Stroker (4.375" or bigger) crank in the Hemi usually wound up getting up in the cam and Paul Savadin (Paul's Crankshafts) and I had a long talk about the merits of the 2.200 BBC journals on the B/RB/hemi's for that reason as well.