different 318 question

What I mean by it drops off is that it no longer pulls, just makes noise. 60 mph is about 3000rpm, 70 mph is all I got. So before I make a cam decision I will run a comp test, check the timing , making sure the advance works. Don't have glass packs, the timing chain is not original, but it could be stretched. AJ I didn't understand half of what you wrote, wyrmrider if I read your thread correctly you would run the 252.
Thanks