Charger R/T option E37 featured a tuned "Six Pack" version of the engine characterised by triple sidedraught Weber carburettors, formed the basis of Chrysler's touring car racer for 1971. This engine could also be ordered as an option on all models The Charger R/T E49 engine produced remarkable torque on a seven bearing configuration which enabled considerable power development previously unobtained from 6-cylinder engines and not surpassed until the Porsche Turbo 911 (300) release of 1975 The Charger 770 SE (Special Edition) featured the E55 option; which was the 340ci 4bbl V8 engine, many motoring journalists correctly reported at the time as being imported by Chrysler for an aborted racing touring car homologation exercise. Chrysler Racing Manager John Ellis stated at the time that a ute fitted with the 340ci V8 (and the same wheelbase as the R/T Charger) was track tested at the Mallala circuit in South Australia by racing driver Leo Geoghegan (and on local roads by Leo and his brother Ian), but was found to be 2–3 seconds slower around Mallala than the E49 (the heavier V8 at the front caused severe understeer and required earlier braking than the Hemi six). Despite the slower lap times at Mallala, it was expected that the extra power of the 340ci V8 would have worked better on the long straights and uphill runs at Bathurst where there were few heavy braking or tight corners. John Ellis then incorrectly stated that the 340ci engines were not imported for Bathurst and that an R/T 340 Charger was not being considered. 336 340ci engines plus 4 speed gear boxes were imported by Colin Adey under direct instructions from Chrysler Chief Engineer Walt McPherson. Chrysler General Manager David Brown and Walt McPherson had discussed the short comings of the E49 265ci and decided the 340ci was to be the next R/T Touring Car. This information never filtered down to John Ellis. Due to bad press coverage at the time the 340ci program was aborted and Chrysler did the only thing it could do which was to recoup the cost outlay by selling the stocks of the imported 340ci engines. The engines were sold off in the upmarket 770 SE (Grand Tourer) Charger. The SE was fitted with an imported 'Torqueflite' 727 transmission, Chrysler further watered down engine performance by using a single pipe exhaust system. Apart from its unique engine, the Charger 770 SE