408 stroker rod bolt interference?

I am in the process of assembling my 1973 LA 360 block to make it a 408 stroker. I have a Molner forged rotating assy with H beam rods. I noticed after putting in the first two piston assys that the clearance between the rod bolt head and the block is very tight. About .040 on the first one and about .02" on the other. This is between the head of the rod bolt and the bottom of the cylinder. Anyone have this issue? Do I need to remove things and remove some block material? What should the clearance be? Thanks.

rod interference.jpg