un copié collé
The heads on the 351 4 barrel engine were very similar to the Boss 302 heads.
In 1971, Ford offered only a two barrel version of the 302 motor. The Boss motor option was called the Boss 351. The 1971 Boss 351 could be called Ford's greatest performance small block motor. The Boss 351 was a very unique motor. It had all of the best Ford could offer:
- Heads just like the Boss 302 with canted-valves
- Canted-valves (2.19" intake and 1.71" exhaust)
- Compression chamber of 66-67 cc (compared to the Boss 302's of 57-60 cc)
- Four bolt mains - specially hardened
- Cast Crank shaft with 90% nodularity
- Forged steel rods - shot-peened & magnafluxed with heavy duty 3/8" bolts and nuts
- Forged aluminum pistons with pop-ups
- 11.1:1 compression
- Mechanical camshaft of 290 degrees of duration & 0.477" of life
- Hardened and ground pushrods and guide plates
- Aluminum dual plane intake manifold
- Autolite 4300-D carb