Resurrecting an old thread...
Here's the article:
http://www.angelfire.com/nv/conv/stovebolt.html

Looks like the Cadillac 368 is so reviled that nobody is making pistons for it anymore. I've found a couple of pairs, and a set of four, but can't nail down 6 the same, except for a $700 auction listing on the unmentionable website.

The offset grind in the Cadillac article results in a 3/16" stroke increase, only half of which (3/32" = 0.09375") needs to be accommodated at the top. The "Cadillac" piston has a .029" short compression height, and the 292 rod is .053" shorter, leaving the pistons about 0.045" in the hole on an unmolested block, very similar to the stock configuration. This gives roughly 9:1 with an 848 (79cc) head. Note that the Cadillac piston pins are larger than both the 261 and 292, requiring that the rod ends be opened up to accept the larger pin.

I'm wondering why I couldn't just offset grind the crank and use the 292 rod, but mate it with a 261 piston, which would end up about 0.016" in the hole. Compression would be about 9.5:1, without decking the block or milling the head. And, since both the 261 and the 292 use a 0.927" piston pin, shouldn't they mate without modification? Or is there another difference I'm not aware of?

Any other reasons this wouldn't work? (Rod to piston skirt clearance?)

Thanks for any insight.

261 Caddy 261 stroked 261
Bore 3.75 3.80 3.78 (+30 Pistons)
Stroke 3.938 4.125 4.125
CID 261 281 278

Head Volume cc 95 79 79 (848 head)
Swept cc / cyl 712.7 766.6 758.6
Compression 7.13 9.08 9.49

Piston comp height 2.036 2.007 2.036
rod length 6.813 6.76 6.76
1/2 stroke 1.969 2.0625 2.0625
total 10.818 10.8295 10.8585
block height 10.875 10.875 10.875
piston below deck0.057 0.0455 0.0165