Can someone tell me the correct power brake booster to get that will fit my '70 w/ 454 and where I should buy it ?
I have heard that a smaller diameter booster is needed to clear the valve covers on the big block.
Any other related advice is welcome.
thanx :D

I got mine from MP Brakes, a 9 inch booster, for a 4 wheel Baer disc setup, looks good and it gets good press, but I'm still building mine too, so I can't tell you how it feels yet.

John,a stock 12" power booster will clear stock low-rise BBC valve covers. They might even clear tall covers but it gets pretty snug.