Last night I looked in some old Pontiac sales books and catalogs I have for the 1970 model year and they stated (remember these are usually published before thay start making the cars) that biggest engine available in the Tempest/Lemans line was the 330hp 400cid with the Turbo Hydro transmission. No mention of 4 speeds being available. When the GT-37 came out at mid year, I think Pontiac's intention was to offer the RA III sans the ram air equipment with the 4spd on the GT-37 but some circumstance kept them from offering this combo so they went with the standard GTO 350 hp power plant with the 4 speed. Kinda like the ill fated LS1 RA IV SD (RA IV top end / RA V bottom end) that was to be available on the 70 1/2 Trans Am. Engine codes were listed but no engines or cars were ever made. All 70 1/2 Trans Ams with the LS1 option came with the GTO 370hp RA IV motor. They even used the same engine codes; WW for 4 speed and I can't remember of the top of my head the code for the auto trans RA IV.
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