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I done the same thing.....went with a stock type control arm bushing and poly everywhere else. A couple of buddies went with 100% poly and had no problems but I didn't like the harshness. I think the LCA poly bushing adds a good deal more of the hardness into the ride....?
What's that saying? You can catch more flies with honey than vinegar? Ya just don't have to be so rude, do ya? And that pin you speak of is called the lower control arm shaft.....
I think after a lot of complaints about squeaks when the poly stuff first came out changed the way they are made.....I've heard mention of graphite impregnated bushings......?
The only problem I've ever had with poly bushings is squeak......and yes, you need to have the stock shells or buy some if needed. Seems like iirc, they are for sale from various vendors. Been awhile since looking into it.
My 71 340 Cuda didn't seem to mine it. Someone had replaced the original idler with a regular one but then I was also told that was the way the factory made them. Just too much fog out there lol. I looked around for a longer idler but never found one but that was during the mid 80's (bought the...
The idler won't do anything to the ratio of the box but it does play a different game with the Ackerman steering angles in a turn and the tighter the turn, the more scrub it'll have.
And I need to proof read my mess better....all the '71' E cars with the 340 came with the fast ratio steering. Had a 72 340 Challenger in the mid 70's and had no idea if the steering was faster or not but it did handle pretty good.
Had a 71 340 Cuda with the setup. The way I understood it, all the 340 E cars came with it.....but thought the box ratio was a bit different. Learnt sumtin new taday! Thanks