I just thought about water jackets. Any chance of cutting into one when decking?
For me, IMO, the only benefit to building a 1500 or 1300, out of a 1600 is to get lower reciprocating masses for a higher revving engine with the appropriate bottom end, of course.
I suppose for less $, for a street machine, one could drop in a 4AGE to get the same outcome. If racing in a vintage class, no such allowance. Sorry for the hijack.