headers vs manifolds on a 318 2bbl difference ????

318willrun said
EVERY 1970-1979 350 Camaro on the street from 1985 to 1995 had 400 horse. I know this, because they told me....

Only 400? They were pushing 5-600 in Boise and Spokane in the 80's. lol
Have you ever heard of a radiator that adds a 100. lol