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#1
01-11-2018, 07:36 PM
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73 74 SD Head bolts
Do the 73-74 Super Duty's use washers under the head bolts? It was pointed out to me today my 74 has washers under the factory bolts and was asked if it was correct.
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#2
01-11-2018, 08:43 PM
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I have heard this too. From a very reliable source.
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Mike/Illinois |
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#3
01-12-2018, 08:31 AM
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Yes, that is certainly correct. It was limited to the SD-455 during the 1973 and 1974 model years. I don't know that they were used on any other Pontiac V-8s before or after.
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#4
01-12-2018, 10:01 AM
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great, thanks. I see the picture of the SD Engine on the cover of your book appears to show a washer under the bolts. Do you know of a replacement manufacturer? I have at least one that is cracked.
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#5
01-12-2018, 10:20 AM
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SD Washers:
__________________
John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! W.E.C moment "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#6
01-12-2018, 10:53 AM
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Excellent
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#7
01-13-2018, 03:55 PM
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The one I took apart had no washers. 1974 car heads never off till last year.
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#8
01-13-2018, 04:43 PM
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Do you have the block date and/or the car build date?
__________________
John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! W.E.C moment "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#9
01-14-2018, 09:41 AM
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I cant easily get the block or head dates codes, but I can faintly see the block casting number in a picture I've dug up it "appears" to be 1203. The Pontiac paperwork shows the car shipped to the dealer 5-10-74. Unfortunately the cast eagle crank in this block, installed by the prior owner, failed the thrust bearing test while doing a cam change. I'm having the motor gone through with a new forged crank, rods, etc..leaving no stone unturned.
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#10
01-14-2018, 07:23 PM
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At 1st I was going to say it probably is an 'I', but I have a lot of SD's at 'L' 203.
Probably the last batch of SD's cast?
__________________
John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! W.E.C moment "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#11
01-15-2018, 08:12 AM
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The closer I look at my fuzzy picture, it very well could be L203
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#12
02-25-2018, 01:57 PM
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There was a SD455 service block advertised for sale on this forum awhile back. I remember the cast date being March 1974.
Quote:
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#13
01-17-2018, 10:05 PM
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ARP should be able to find the washers.
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#14
02-24-2018, 12:44 AM
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I purchased these from Fastenal. They are a perfect match.
https://www.fastenal.com/products/details/33405
__________________
69 GTO 400, 4-Speed, Matador Red 69 SCJ Mach 1 Mustang, 4-Speed, Drag Pack 72 Trans Am, 455HO, 4-Speed, Lucerne Blue 73 Trans Am, SD-455, 4-Speed, Brewster Green 73 Formula, 455, 4-Speed, Ascot Silver 73 Formula, 455, Navaho Orange Survivor |
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#15
02-24-2018, 07:36 AM
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Do they have to be a certain hardness rating?
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#16
02-24-2018, 11:18 AM
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The factory washers were definitely hardened.
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