Steve I re-read your original post. Sorry I glossed-over the stroker part the first time. Based on your stroke measurement I suspect it may be a stock crank offset ground for 3.7" stroke, that was the hot thing to do back before Chinese crankshafts came on the scene. The rod journals would be ground to 2.100 diameter and 6" Chevy rods were used with the big ends narrowed 0.550 to fit on the 1.66 wide Ford journals.
The other particulars were D1AE heads, 0.040 or 0.048 head gaskets, and flat top pistons with 1.320 pin height. The pistons and rods were available off-the-shelf a few decades back. The pop-up domes in your engine, well that's something else.
There's a pic of a rod below, showing the rod is narrowed on one side only, the rods would be assembled on the journal so that the narrowed sides faced each other. The big end width of Ford rods is 0.830, Chevys are 0.940,
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