October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.
Engine Unit Number
See 1968 Engine data.
| Engine Code |
Displ. & Carb. |
Comp. Ratio |
| VA, VB, VE, VF |
250" 6 1 Bbl. |
8.5:1 |
| QA, QB, QI, QJ |
350" V8 2 Bbl. |
9.0:1 |
| TB, TC, TD, TL |
350" V8 4 Bbl. |
10.25:1 |
| QN, QP, QV |
350" V8 4 Bbl. |
10.5:1 |
| QX |
350" V8 4 Bbl. |
10.5:1 |
| QR, QS, QW |
400" V8 4 Bbl. |
10.25:1 |
| QT, QU |
400" V8 4 Bbl. |
10.5:1 |
| UC, UD, UJ |
455" V8 2 Bbl. |
9.0:1 |
| UN, UO, UL |
455" V8 4 Bbl. |
10.25:1 |
| US, UT, UV, UW |
455" V8 4 Bbl. |
10.25:1 |
Courtesy of GENERAL MOTORS COMPANY