66' Duster with a 340 Hemi? LMAO!

my dads buddy told me he put on the tall MT valve covers on so it would give him more compression!..lol?..wtf>?..and swears his 72' 340 Challenger rallye originaly had a canopy vinyl top?..uhhh? but i hear the I had or my dad had storys all the time! like a 68' Challenger with a 440 Hemi! that would do wheelies! haha! i just laugh and walk away..