420 SEAC and 4.3 Griff ANDDD 4.2 Range R***r

[v8griffith]

Does the SEAC have the same engine and power as a 4.3 Griff.I have seen bore sizes of 94mm and 93.5 which is which?
And where does the Rangie fit in?

[2 Sheds]

The Griffith 4.3 has more or less standard heads and bottom end , The 4.2 SEAC has stage 3 / 4 Heads and full race bottom end , ie Cosworth pistons, forged rods hotter cam etc. and about 30-40 bhp more. the 420 SEAC was a development of the 3.5 L , the Griffith 4.3 is based on the 3.9 hence 94mm bore.