If youve had questions about integral vs. non-integral head inline 6's w/pics

[tkeduk8r]

Well I tried a post about this as a response to a post a few days back, but I figured I'd try to contribute a bit to the board instead of take so here goes.... I just happen to have both versions of the inline 6's in the shop right now, pulled and on engine stands... the orange and forst one Ill post pics of is a 1966-67 non-integrated intake 250 (like most of us have) with a power steering unit off of a 73 chevelle that I had laying around. This is representative of what the sixes in the 67-72 range would have had in them.

The second group of pics is an integrated intake 250 that I recently pulled from an 82 C10... This also has power steering on it, but the brackets are very different and will not interchange between the two (as illustrated). The integrated heads were standard on trucks beginning around '78 and have had a reputation for cracking, so they are popularly viewed as undesirable. I however have had good luck with both the integrated 250's I have owned and I think the updated technology in the carb (2BBL) and the exhaust (dual outlet) make them better performers (in stock condition vs. there older non integrated counterparts) and better at the gas pumps (i routinely got 17-19 mpg on 55 mpg trips in my 80 K5 blazer in the 90's).

Well here are the first group of pice of the NON-integrated intake 250. Notice the conventional valve cover and the single barrel Rochester Monojet. There are single bolts, threaded perpindicular to the pushrods, with unique retainers that clamp both the intake and exhaust manifold to the head.