Most likely a misprint. My 1970 Engines manual shows 340 ft lbs for the 340 & 320 for the 318.
And figures for the 340 were far from fudged.....
PHR magazine tested the factory HP rating of the popular small block engines to see if they actually made the advertised HP. Results were published in Feb 69. The 340 was the only engine to do this & in fact made 20 hp more!! 295 hp v 275 adv. No other engine made the adv hp. Here are the numbers, numbers in brackets are the actual hp made.
Olds 350 W-31 325 [ 280 ]
Pont 350 H-O 325 [ 255 ]
Chebby 350 300 [ 240 ]
Ferd 351 290 [ 210 ]
Amen...
