Early and Late is the differential between Dport and Roundport. As best I know of.
Better verbage would have been Early .... and Very Late.
68 HO (WS) had same standard axle ratio as Base (WT) 3.55
And the same air cleaner.
But either of those engines could have been ordered with 3.90 or 4.33 at small charge (after upcharge for posi)
68 RA cars were shipped with standard air cleaners and closed scoops.
Selling dealers were to make the mods and install RA for their customers, with supplied material from PMD in the trunk.
7029273 came with Ram IV release , and eventually co-joined with Ram3 production.
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