This is from allpar where I got that info but I always thought it was 2.02 or 1.88 also.
1972 - The 340 four-barrel dropped to 240 horsepower:
Compression dropped to 8.5:1; the compression height of the piston via wrist pin location changed by 0.10”
The crankshaft was switched from forged to cast somewhere in the production cycle, believed to be in early April 1972, with engine 39118000 (thanks, Karl Thomas); a milder camshaft was used
340/360 were moved to “J” casting heads with 1.92” intake valves; exhaust valves remained the same
