Just to bring y'all up to date, Tegger and I did some off line conversing and it appears that 1982/83 1300 engines did have two different compression ring thickness as follows: Top ring - 1mm and 2nd ring - 1.2mm.
Called Majestic and while they are available, they are on back order so who knows how long. Fortunately, found a set on eBay that specified the above dimensions and snagged 'em for $50 including shipping and insurance.
Needless to say, my big overhaul project scheduled for last Saturday got pushed back but as soon as the rings come in, I'll hopefully be back on (some sort of) schedule.
The scheme is to use the pistons/rods out of the '83 which is a five speed with 110K and put them into the $200 '82 bare bones Civic wonder that has nearly zero compression on #1 and sucks up about a quart of oil per 200 miles. One guy whined that I killed all his mosquitoes and I just replied, "No Charge!"
The second part is to rehab the original FE engine with new pistons, rings and bearings and eventually reinstall it into that car. Then the '81 engine can be resealed and held as a spare on standby should the worst happen...
JT
(Who refuses to enter the 21st century regarding transportation...)