I use a Ford knock sensor off a 351 truck in my SB Fords.
It worked with my J&S and it works with my Holly HP just fine.
I mounted it on the block top flat edge between the transmission block plate and the rear China wall.
I can dig out a part number if you need it, but it is from a 90's pickup with 351W engine. It is a round black two-wire with a single 5/16" hole in the center for mounting. I just found a clear spot, drilled a proper size hole through the block in a clear spot, and tapped it for a 5/16" bolt. By placing the sensor there midway between banks, I get good signal from both banks and it is away from timing chain noise and all the headers and stuff.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
89 LX. 363, single turbo, Super Vic EFI, TFS high port heads by TEA, solid roller, glide. Holley HP EFI. (exact combo varies)