For machines that are used there are several kinds, like :
- 198 cu in (3.24 L) Slant 6 I6,
- 225 cu in (3.69 L) Slant 6 I6,
- 318 cu in (5.21 L) LA V8,
- 340 cu in (5.6 L) LA V8,
- 360 cu in (5.9 L) LA V8,
- 383 cu in (6.28 L) B V8,
- 426 cu in (6.98 L) Hemi V8,
- 440 cu in (7.2 L) RB V8.
And for transmission 3-speed manual, 4-speed manual, 3-speed TorqueFlite automatic.
And for the performance, 383 CID Magnum V8, rated at 335 bhp (249.8 kW); 300 bhp (223.7 kW) for 1971, due to a drop in compression.
The standard transmission was a 3-speed manual. Optional R/T engines were the 375 bhp (279.6 kW) 440 cu in (7.2 L) Magnum, the 390 bhp (290.8 kW) 440 CID Six-Pack and the 425 bhp (316.9 kW) 426 cu in (7.0 L) Hemi.
some information i get from http://en.wikipedia.org/wiki/Dodge_Challenger
1970 Dodge Challenger Video
Hey check this out some video 1970 Dodge Challenger i get from youtube