....cause the hole in the head got smaller :confused: Just kidding, I have wondered that too. Thats one of them questions that I always think about but forget to ask. Thanks T.L. I hope someone knows.
Was it 75 or 78 I think it had something to do with less space needed and heat dissapation . I want to know why they made those useless stamped rockers too . It probably all has to do with saving money .
My 77 had the small plugs. Maybe it was that you couldn't get the big ones in and out with all the smog crap hanging there.
Ya know, life is funny. I am certainly old enough to remember the plug size changes, unfortunately, I am too old to remember why! Dan
Correct me if I am wrong but I thought they changed spark plugs to a design that operated at the best self cleaning temperature since they had to change to unleaded fuel in 74 or 75 I think and unleaded has a higher burn off temp than leaded. I think there was also sumthing to do with the catalitic converter getting damaged. I dono, Im going off the top of my head here, sumone probly knows for sure tho.
