| Triumph Spitfire and GT6 propshaft lengths | length | |
| Spitfire: | (inches) | (cm) |
| mk1 through IV, no overdrive | 41.25 | 105 |
| mk1 through IV, w/ D-type overdrive | 38 | 97 |
| Spitfire 1500, no overdrive | 38 | 97 |
| Spitfire 1500, w/ J-type overdrive | 37 | 94 |
| GT6: | ||
| all, no overdrive | 38.75 | 99 |
| all, w/ D-type overdrive | 35.25 | 90 |
| Source: Jigsaw Racing | ||
| http://www.jigsawracingservices.co.uk/useful.htm | ||