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291C Heads / Accessory mount holes |
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DoughertyAMX
Supporter of TheAMCForum Joined: Sep/20/2016 Location: Washington, Ind Status: Offline Points: 519 |
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Posted: Oct/16/2017 at 1:51pm |
My 70 390 heads are ready to install, but they are not marked left and right. Each head has two mounting holes on one end, and each head has three mounting holes on the other end. I am assuming the ends with the three threaded holes/mounting bosses, go towards the front of the engine and the ends with two go towards the back?
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304-dude
AMC Addicted Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9081 |
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They can only be put on one way. Left side will have a different number of holes and location spots than the right side.
The only difference over later heads is the left is missing the upper hole for later AC pump bracket, and the auto tranny fill tube mounting may have different hole location. Old and newer power steering pump brackets fit right side. |
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71 Javelin SST body
390 69 crank, 70 block & heads NASCAR SB2 rods & pistons 78 Jeep TH400 w/ 2.76 Low 50/50 Ford-AMC Suspension 79 F150 rear & 8.8 axles Ford Racing 3.25 gears & 9" /w Detroit locker |
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Rebel Machine
AMC Addicted Joined: Jul/03/2007 Location: Western Il Status: Offline Points: 5118 |
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There is no left or right, you can't put them on wrong. -Steve- |
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Boris Badanov
AMC Addicted Joined: Dec/14/2013 Location: NH USA Status: Offline Points: 4209 |
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I owned a 1970 390, -Steve- is 100% correct.
That is unless someone added a hole or two..... |
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Gremlin Dreams
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DoughertyAMX
Supporter of TheAMCForum Joined: Sep/20/2016 Location: Washington, Ind Status: Offline Points: 519 |
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Well that makes it easier! Hadn't even tried to install yet and just assumed there was a left and a right. Have worked on way too many SB Chebbies.............
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one bad rambler
AMC Addicted Joined: Jan/09/2008 Location: On The Island Status: Offline Points: 2007 |
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They are missing the hole for the throttle pressure linkage for a 904-998-727 but the plate can easily be extended to use the other bolt hole...ran into this with my sons project
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68 AMX 390 4 Speed,68 American,64 American 2 Door Wagon Altered Wheelbase,78 Concord Build 360,727,8.8
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