Steve,
before the advent of the inexpensive crankshaft castings & fordgings manufactured in China, a 377 Cleveland was the most popular Cleveland stroker! That is a 3.70" stroke and a 0.030" over bore.
The 3.70" stroke crankshaft was achieved by off set grinding the rod journals of the stock cast iron crank to 2.10" diameter (small block chevy size). This increased the throw of the crankshaft from 1.75" to 1.85". This was then combined with a set of 6.00" Chevy connecting rods and custom pistons with a compression height of 1.35".
Because your motor was referred to as a 373, that probably means the cylinders are only 0.010" over bored ranther than 0.030". This is a good thing, as it means this block has more life left in it.
Going "over-board" with your friend on the DTBB, George
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