Dimensions & Fitment
Critical measurements for LL8 swap planning and clearance checks.
Block Dimensions
Length (Front to Rear)
29.75"
Width (Side to Side)
22.5"
Height (Pan to Cover)
30.7"
Weight (Bare Block)
320 lbs
Oil Pan Depth
Factory Oil Pan: 10" deep (measured from block flange)
Issue: Front sump with transfer case passage - too deep for most RWD swaps
Solution: Custom rear sump pan (Emtech, Forever Fabrication, Stutz Performance)
Valve Cover Height
Plastic Cover: 18.85" (oil pan to valve cover top)
Aluminum Cover: 18.85" (can be machined 1-2" for clearance)
Note: 3.75" taller than 2JZ-GTE, 2" taller than LS engines
Compared to Other Engines
| Specification | Vortec 4200 | Barra | 2JZ-GTE | RB26 | Ford 240 | Ford 300 |
|---|---|---|---|---|---|---|
| Bore (in) | 3.662 | 3.632 | 3.386 | 3.386 | 4.0 | 4.0 |
| Stroke (in) | 4.016 | 3.910 | 3.386 | 2.902 | 3.18 | 3.98 |
| Deck Height (in) | 9.150 | 9.220 | 8.622 | 7.421 | 10.0 | 10.0 |
| Head Gasket (in) | 0.023 | — | — | — | — | — |
| Rod Length (in) | 5.984 | 6.060 | 5.591 | 4.783 | 6.795 | 6.210 |
| Rod/Stroke Ratio | 1.49 | 1.55 | 1.65 | 1.65 | 2.14 | 1.56 |
| Piston Compression Height | 1.131 | 1.205 | 1.338 | 1.187 | 1.615 | 1.800 |
| Displacement (ci) | 254 | 243 | 183 | 157 | 240 | 300 |
| Displacement (cc) | 4159 | 3983 | 2998 | 2569 | 3929 | 4918 |
| Block Material | Aluminum | Iron | Iron | Iron | Iron | Iron |
| Compression Ratio | 10.1 - 10.3:1 | 8.47 - 12.0:1 | 8.60:1 | 8.62:1 | — | — |
| Redline | 6000 | 6000 | 6000 | 7000 | — | — |
| Engine | Length | Width | Height | Weight |
|---|---|---|---|---|
| LL8 4200 | 29.75" | 22.5" | 30.7" | 430 lbs |
| 2JZ-GTE | 28.9" | 26.6" | 27.0" | 440 lbs |
| LS3 | 27.5" | 26.4" | 28.8" | 415 lbs |
| 5.0 Coyote | 28.2" | 26.0" | 29.5" | 444 lbs |
LL8 Advantage: Narrower than V8s (22.5" vs 26"+) - fits where V8s don't
LL8 Challenge: Taller than most engines - requires hood clearance planning