I don't know if your '69 has the 7/16 in front or the 3/8. The earlier '67 and '68 had 3/8" u-bolts and several board members have had them break at the most inoportune times...like going 70 on the freeway. It makes for a very sharp and unexpected turn!!!! I am going to upgrade mine to 7/16" as soon as I can find the time...need to put the new cab on first!
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'68 C20 Longhorn 50th Anniversary 400/TH400
'68 C20 Longhorn 50th Anniversary 468/TH400w/buckets
'72 C20 Halfhorn (Longhorn w/o cab and front clip)
'69 Flxible Cruiser (look up ugly in the dictionary)
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