different heads on a 360
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Elder User
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From: iowa
different heads on a 360
ok this is a shocker to me right now, i finally got around to getting some new exhaust manifolds for my 360. they are due any day now i hope lol. Yesterday i was over at the previous owner of my truck to show off how i got the engine looking and running now ( see my gallery ) I told him that i had the new parts coming and he then informed me that these are not the original heads on this engine that came with it. That when they rebuilt it they found the heads were too far gone to redo so they swapped them out with some other ones somebody had. they fit okay and work fine but when they put the exhaust manifold back on the end bolt holes did not line up with the heads. So they had to modify the heads a little by drilling a new hole a little higher then the original hole to mount the bolts to the manifolds. My question is what are the heads that are on my truck now ? how do i tell what heads i have ? where do i look to see any numbers or anything that will tell me what they are ? can anyone help ?
update - i found the numbers on the head
C8AE-H on both heads
what are these ? and whatever else you can tell me about them.
update - i found the numbers on the head
C8AE-H on both heads
what are these ? and whatever else you can tell me about them.
Last edited by Opiewan; Sep 30, 2003 at 07:05 PM.
Post Fiend
Joined: Feb 2001
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From: Missouri
That is weird. I don't know what heads you had but the C8AE-H heads are everyday run of the mill 360/390 heads. They are great heads. Get the casting numbers off the old ones. I think the FT heads had different spacing on the bolts. Surely you didn't have those on there.
Last edited by Ratsmoker; Sep 30, 2003 at 07:18 PM.
Post Fiend
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From: Brea CA
Sounds like you got the 14 bolt C8AE-H heads used in the intermediates. The top bolt holes on each end of the head are lower than the center two bolt holes. You also should have the diagonal bolt holes too. The diagonal holes are what the intermediates used except for the top (lowered) bolt hole on the driver’s side for #8 and that was only for '66. After that they used all the diagonals and none of the top ones.
Question I have is what did you use for bolt holes on the center ports? There are no holes below the ports on those, just the diagonals. Only 16 bolt CJ heads have all the holes (four per port) for both the diagonal and vertical bolt holes. The CJ heads also don’t have lowered bolt holes on each end, they are the same height as the center ones.
Barry
Question I have is what did you use for bolt holes on the center ports? There are no holes below the ports on those, just the diagonals. Only 16 bolt CJ heads have all the holes (four per port) for both the diagonal and vertical bolt holes. The CJ heads also don’t have lowered bolt holes on each end, they are the same height as the center ones.
Barry
Last edited by BB; Sep 30, 2003 at 07:26 PM.
Post Fiend
Joined: Feb 2001
Posts: 6,624
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From: Missouri
That just means Dearborn Iron Foundary. Most everything made there has it stamped in somewhere. Was there a big difference in performance when you bolted these heads on?
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Post Fiend
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That's a good point Barry. I didn't know that about the 14 bolt heads. We'll have to see what he has.
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Elder User
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From: iowa
wow BB you know your stuff, unfortunely i dont know mine. As i said before i didnt do this, the previous owner had it done and he isnt much help. All i know right now is what i can see, i found this out last night. i guess i never really paid attention to the heads. But you are right about the outside hole on top being lower cause i can see the bolts at an angle on the outsides. The guy said they had no problems putting them on these heads ( C8AE-H) except for the bolts on the end , which he said they had to put them at an angle, he left and went on a wlak while the guy was doing it i guess. I will be finding out more about this when i go to put the new manifolds on as soon as big brown shows up with them. I guess they had this done about 3-4 years ago, so hopefully the bolts come out fairly easy, gonna spray them down with some stuff and heat them up, hell might even try the candle thing on them.
Post Fiend
Joined: Feb 2000
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From: Brea CA
Thanks man!
Here's a pic out of Steve Christ's book. The top head is a 16 bolt CJ, second down is a 14 bolt intermediate car head, third one is a 8 bolt full-size car and truck head and the bottom one is a truck FT head just for fun.
Here's a pic out of Steve Christ's book. The top head is a 16 bolt CJ, second down is a 14 bolt intermediate car head, third one is a 8 bolt full-size car and truck head and the bottom one is a truck FT head just for fun.
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Elder User
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From: iowa
do the ends of them look any different? mine has a bolt hole on each end that doesnt seem to be for anything
they are defintly not number three or number 4, defintly one of the first two cause i can see the holes down low on the little bumps
also on the heads near the #1 plug and the #5 plug are the letters WI and the number 45 does that help any ?
they are defintly not number three or number 4, defintly one of the first two cause i can see the holes down low on the little bumps
also on the heads near the #1 plug and the #5 plug are the letters WI and the number 45 does that help any ?
Last edited by Opiewan; Sep 30, 2003 at 08:44 PM.
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Elder User
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From: iowa
okay i went outside and crawled around and saw i defintly have the bolts on top and directly below in the middle too so i defintly have the top one, the 16 bolt CJ now tell me is this good or bad
Post Fiend
Joined: Feb 2000
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From: Brea CA
Well, I would say it would be great but a CJ head does not have the C8AE-H casting number, it's C8OE-N. Also, the CJ head does not have the lowered bolt holes on the ends either. So what you're saying is you have 16 bolt C8AE-H heads with the lowered end bolt holes on the top row. Have never seen a stock head like that except when it's been modified and somebody drilled them themselves. That's what I'm thinking yours are.
Barry
Barry
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From: iowa
all i know is what you guys been telling me, i will be taking them off soon and i guess i will know for sure, if you have never seen the 16 bolts with lowered end holes, i would think what i have is a modified 14 bolt head. either way as long as they are okay then i guess i really dont have a problem do i ? i just have to be carefull mounting the manifolds back on when i do that so they seal right.
so i take it that there was a special exhaust manifold for this application then. ever seen one of those ? how rare are they ?
so i take it that there was a special exhaust manifold for this application then. ever seen one of those ? how rare are they ?