Cape Cod Bob,you've not replied to us thread hi-jackers but just this past Sat.10/13 a set of .125" over 283 or 302 pistons sold on ebay for $113,never used.They were cast of course at that bid but the parts are available if you decide to go that route.And you also have to have a 283 block that will take that bore (many won't ) or find a 350 that will get by with just a hone,,,,then use childs-alberts sj in lj block spacers or clevites thick bearings but they only allow cranks that are no more than .010" under mains.
Ah forget it,,,put one of those 3.75" sj stroker cranks in it!
(if its one of those 283 and/or 327 blocks with clearance)