You're talking about the Slant 6 right?
Nope. A straight 6 with Hemi head. In E37, E38, E48 and E49 form they ran triple Webers. Pumped out in excess of 300hp in the high comp versions. In racing trim probably closer to 400hp. A stock E49 was claimed to do the standing 1/4 mile in low 14 seconds on street rubber. They sound wicked at full noise.
Chrysler Australia also made an E55 which was a 340, the first half of them were older 1969 high comp engines. The later ones were the lower compression ULP engines. These were all auto though and single exhaust so were hamstrung so to speak.
Prior to 1972 we had two premier stock racing categories: Group C and Series Production (or Appendix J).
Group C was a modified class, dominated by US vehicles like Mustang and Camaro. A Holden Monaro won it in 1970 running a TRACO 350. Bob Jane won it in 1971 and 1972 with a 1969 ZL1 (an anctual ZL1). Allan Moffat campaigned a Kar-Kraft Boss 302 Mustang.
Series Production was the stock road cars with minimum production numbers to be eligible. Towards the end of the 60's and early 1970's it became a "win on Sunday, sell on Monday" at all costs setup. With the Ford, GMH and Chrysler building minimum build numbers of high performance factory cars. The GT-HO Falcons ran 351C 4V engines that were hand re-built here in Australia with solid camshafts and the final ones had 780cfm Holleys. GMH ran Monaros with 300hp L48 engines and later ran little LC and LJ Toranas (basically a Vauxhall Viva) with triple carb 6cyl engines. Chrysler had the E48 and E49 Chargers. For 1972 Ford had teh XA falcon variant of the GT-HO planned, GMH had a 308ci V8 powered LJ Torana and Chrysler were planning a 340ci Charger. There was a big shake-up due to these 140mph road cars and it all got canned, and after that the Group C and Series Production rules were changed to become just GroupC where a lot more freedoms were offered so that the manufacturers didn't have to build these high performance road cars anymore, just build the parts and the less powerful road cars could be modified. Remember GMH at the time were governed by the same Corporate racing ban that GM US had, and all this racing was done by the "Dealer Team" at arms length from GMH - essentially through the back door just like it was done in the USA.
Here is an E48 in recent action, an E48 is a regular fuel version of the E49, so less cam. But makes similar noises just not as sweet or as fast:
Follow John Ravic & Ben Mili as they compete at Targa Tasmania 2018 with their Chrysler Valiant Charger E48 six pack
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Here is a 450hp Hemi 265 in action on the Phillip Island Grand Prix circuit. You can hear how nice they sound. The little blue coupe you see in an LJ Torana, that was what GMH were putting a 250hp 308ci V8 into.
This Chrysler Australia 1972 E49 Charger's 450HP Naturally Aspirated 265 Hemi Six packs a mean punch on the racetrack, competing in the Group Nc Historic Tou...
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This shows the same race I think from the little blue Torana, 330hp 202ci Holden 6cyl. It sounds nice too:
Onboard Andrew Williams' extremely fast Holden Torana LJ GTR-XU1 from rear of grid as it carves up countless 60s and 70s Muscle Cars at Phillip Island Grand ...
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