Thanks Guys, i didn't think there was anything special about them, but if they were special i would have taken them off and put a set of 67 915 heads on it( just to save them). Now i know the intake is worth some $$$ (long ram) Right??.
Its still Priceless to see peoples faces when they ask whats in my 70 swinger..
them: slant six
Me: No its a 413
Them: WHAT IS THAT? Chrysler never made that size
Me: Long story think of it as like a 440.
I think i might just start saying 440 and save my self the headaches lol
Thank again Guys