@TURNA, yep it's an s60. 4.10s and a helical posi, wildwood discs. They are so stout with basically no upgrades, that's why went that route.
@Kennybill, I originally put this behind a 70 350 i had in the car so I went with the retrofit bearing from supercars unlimited so I wouldn't need to pull the crank. That means I chopped ~3/8" off the input shaft. At that point i just did the same thing for the 403 when i put it in, no need to drill the crank at that point.
It has a 3/4 gen f body master with a john bzdel pedal running to a mcleod throw out bearing. I originally bought a bop cast t56 bellhousing and hydro throw out from wier performance because it was supposed to work with the master I had. It didnt, and in the time I was acummulating parts McLeod introduced their throw out. If i could do it again I'd do the mcleod and a scattershield. A scattershield is coming soon to replace the aluminum bell.
I've always been a fan of the 403. This one is girdled with arias flat tops and a custom erson cam .568/.568 232/240 on a 108lsa. It makes good power and it is a blast. It runs 12s at 4200 with me in it, and the ac is still in it.
Next step is the diesel block I picked up earlier this year.