I was just browsing the net trying to find out how many knock sensors my 3400 has ( shop says two and i can only find one ) and kept stumbling on some neat sites. I grew up in the last good years of 350 chevys and 351 Fords being a dime a dozen and the worst problem with stuffing 460 in a Pinto was how you were going to hook up the throttle linkage. I was reading how these kids are pulling out 3.1's and putting in 3400's and all the sensor switching, computer reprograming and rewiring they are doing and it dawned on me that it takes much more figuring to make the new cars work. One kid had an old Z-24 that he was getting 14.9@ 95 mph, not bad. I used to think it was just a waste of time messing with those cars but they are just playing with the hand that their dealt with.