Attempt at new intake/exhaust for inline 250

['68OrangeSunshine]

Originally Posted by shifty

Thanks, guys. I am going to shorten the rod by about an inch. I really need to do something about the bar itself though.

Here's one for you: My Z-bar (what I guess is the Z-bar) and the Y-shaped mount that holds it to the motor are both shot. The cloth rings and round rubber seals on both of them are totally shot. I really need to tear it down, clean it up and rebuild it.

Where do you find replacements for these rings and what are they called? Does it come in a kit or something?

I got my stuff from LMC. I disassembled a junkyard Z-Bar [keeping the original intact for reference], blew out the old grease, stripped it with a wire wheel, repainted it and reassembled it with new parts. Even added a new grease fitting. P/Ns: felt washer 30-0695, spring (lock) 30-3103 (x2), seat 30-2392 (x4).
The L6 engine ball stud and bracket assembly could be refurbished, I think. If the bracket is still good, but the L6 ballstud is worn, you could drive out the crimped-in old ballstud, and drill and tap for the threaded [ but still-available] V8 engine ball stud, maybe tack welding it to the bracket or backing up the threaded part with another nut. If the "Y" bracket itself is shot, it could be duplicated out of 1/4" strap steel and the V8 ballstud (engine) p/n 32-6124, affixed in the above manner. I believe the GM dealers still stock this part OEM. I compared a surplus SBC engine ballstud unit off my Jimmy to the L6 set-up and it was the same length and diameter, except for a threaded extension that screws into a V8 block. So if you can't find an L6 engine ballstud and ["Y"] bracket assembly in a junk yard, it could be fabricated by someone who has a lot of time and some talent.