340 cam specs?

Same hereAJ/Form S. Slapped a stock 340 cam with 340 intake and AVS and exhaust on my 69 silverfish. Took a swap from the 2.94 gear to the 3.23 gear till it felt ok to drive. Sounded tough but was sluggish and definitely not a 340. Those stock cams are big. Sound good but there is a reason 318s did not come with them. Nitrous made it run good in 1979.
Tom Hand