It was from MP... I ended up buying 3 of them over
time... I dont know if they quit making them or not

Thanks I'll look into it! I appreciate the help!

Its a single idler gear drive.. you might look elsewhere
for one.... if you want

Milodon sells a single idler gear drive for SBMs, P/N 13600.


http://www.milodon.com/gear-drives/gear-drive-ford-sb-chrys.asp

Looks much like the KB unit.. basically the same
mounting for the idler...I used a piece of paper to
get the idler clearance.. very simple.. they have been
on for years now

What are the options for chain tensioners? Is the MP piece the only one available? I thought I read it wasn't as good as the stock tensioners from the magnum motors?

If I recall the magnum one is the same.. I believe there was
another company making the tensioner also. but I forget the
name.. on a double roller chain it will wear quickly until the
rollers come into contact.. then it slows right down... that
tensioner was designed for the non roller chain like in the
production silent chain

I've had good results from pre-oiling the chain in synthetic gear oil for a day or two prior to install. It's such a small amount of oil that it hasn't had any bad effects that I can tell.

I use the same gear oil on my chainsaw chains, and it works WAY better, probably 2 or 3 times better than any other chain and bar lube I've ever tried. That's how I got the idea.

Some of those timing chains had stamping marks on the outer edge that would sometimes wear down the nylon on the tensioner prematurely, almost like saw teeth, the ones that have the smooth edges don't seem to do this, at least not nearly as bad, I have had the same Mopar tensioner on my engine now with 2 different chains and still good as new, I run the Mancini brand which at the time was a re-packaged Rollmaster made in Austrialia.