c2 3904391 cyl head

[Phil P.]

i have one of my heads (date k 21 6) that does not have the single hump on either end of the head---is this a common thing on these heads? thanks for any input

[Joe L.]

Re: c2 3904391 cyl head

PHIL----

Early versions of the 3904391 cylinder head, which yours qualifies from the date, did not have the single hump ID symbol cast upon them.

[Phil P.]

Re: c2 3904391 cyl head

i have not purchased many a chevy cars that have didn'nt have the "hipo" single hump port heads --- thanks joe --- i will start digging deeper next time --- old dog new ticks ---phil