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70-71 6 cyl short block.? |
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Tarbaby
AMC Apprentice Joined: Jul/23/2017 Location: Seattle Status: Offline Points: 218 |
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Posted: Jun/16/2019 at 7:23pm |
Ok bought this short block sight unseen was suppose to be a 258 but turned out to be a 232, I think. Crankshaft has flange pre 72 7 mains but block casting# and machined flange number says different. Good news is if it is a early 232 I can use it in my 71 Hornet sst. What is it?.
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Frank Alarcon
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ramblinrev
Moderator Group Joined: Dec/28/2008 Location: Wisconsin Status: Offline Points: 11539 |
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I think you have a '74 258 block. 7 04 11 should translate to 1974, April 11 A is for 258
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74 Hornet Hatchback X twins (since 1977)
62 American Convertible (still worth the $50 I spent in 1973!) AMCRC #513, AMO #384 70 AMX 360 4-speed (since 1981) |
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farna
Supporter of TheAMCForum Moderator Lost Dealership Project Joined: Jul/08/2007 Location: South Carolina Status: Offline Points: 19676 |
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A could be a 1970 199 or 71-79 258. The block casting number is 3218618, which is a 70-72 casting number, and could be a 70 199 (same block casting for 199 and 232, 66-70). 704A11: 7 = year code. Could be 65 or 74. 04 = April (4th month) A = 1970 199 or 71-79 258 (or 60-65 195.6 L-head... obviously not that!) 11 = day of month The engine code number isn't fool-proof, you have to do a little investigating. Since the casting number is a 70-72 number (as far as I know, it may have been used later though the sources I had said 70-72) the letter code seems to be out of place. Don't know if it was a mis-stamp (it happened, and with this one not being in-line with the other numbers it could be) or my source for the casting number was wrong on the years. No real way to tell. The only thing you can do is measure the stroke or get the number from the crankshaft. Or better yet measure the block deck. I would really like to know if this is a short deck 65-70 or tall deck 71+ block. It can't be a 70-72 casting number as I have listed -- the block deck height changed by about 1/8" taller for 1971 to allow for the longer stroke of the 258. That's one reason the 199 was dropped -- the taller deck would have needed a longer rod to make a 199.
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Frank Swygert
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vinny
Supporter of TheAMCForum Joined: Jan/05/2012 Location: Calgary Status: Offline Points: 2837 |
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If the starter is on the left which from your picture it appears to be then it is the old style pre v-8 bolt pattern.
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ramblinrev
Moderator Group Joined: Dec/28/2008 Location: Wisconsin Status: Offline Points: 11539 |
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I'm sticking with a '74 block. D4 casting date would be April '74.
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74 Hornet Hatchback X twins (since 1977)
62 American Convertible (still worth the $50 I spent in 1973!) AMCRC #513, AMO #384 70 AMX 360 4-speed (since 1981) |
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