[supcarbob]

The difference in pricing for the WW5 option are 2 reasons. The repeal of the federal excise tax on December 11,1971 lowered the pricing of all options(around 2.5%).All cars invoiced after this date would have-lower- pricing for options.The second reason is the difference in standard equipment content for the 2 models a WW5 option was offered and the price difference between 4-speed and automatic.For example a 4-speed M22 listed for 231.00 and the M40 Turbo Hydramatic was 236.00(5.00 difference),that has the difference for 2 prices and the difference between a sedan and hardtop due to Sport Mirrors not available on sedan(26.00) but RoofDrip Mouldings (13.00) and Custom Carpet(21.00) which are standard on hardtop and not sedan being included--34.00 minus 26.00 for a 8.00 difference between sedan and hardtop.
I have included a scan of my old dealer accessorizer showing WW5 option pricing after the lower price. Any car invoiced(PHS) prior to 12-11-71 would have higher pricing on all options,not just WW5.