Max and Fil would be better placed to guess but he says the 10.7 with 128mph was on his 350 sbc and 100shot of gas, so probably around 500bhp. The 540ci he reckons woul see it to mid 8's so probably around 750bhp at a guess as they post much quicker times with less power than the Jap stuff we're used to.
j.
I have issues !!! ....I used to be average, now I reminisce !!!