Are suspension parts differernt for a V-8 K frame and the slant 6 K frame?
some guys complain about the poly, others swear by it. You might wanna do a search on those parts . I didn't catch if you got front disc or drum . BTW going from /6 bars to 1 inchers, holy cow , that's gonna be a stiff ride if you aren't ready. Was it factory sway or would you be adding that in?
The Just Suspension 1" bars aren't that stiff. I did that
exact swap, /6 to 1" JS bars with my Duster when I dropped in the 318. Ride was pretty nice, even with the plain old Monroe's it had on it. Too nice in fact, I bought a set of 1.12" bars from Firm Feel to upgrade it again, they'll go in with a set of Bilsteins when I drop the 340 in it.
With 1" bars you'll find the ride is closer to that of most new cars. Still probably softer than most. These cars were
ridiculously undersprung from the factory.
I have front disc. Its a 73.
I would be adding a sway bar. It didn't come with one.
I wouldn't get that for awhile anyway. I just want to get this car road worthy first.
What size bars should I be looking for?
I know quite a few guys on this forum bought the 1" because of the price @ $199.00.
Just get the 1" bars. The ride is still softer than most new cars, and your handling will be improved by light years.
As far as the kit, if you're going to get the Just Suspension bars I'd just buy their kit, you might even be able to swing a discount. The poly bushings are nice, but if you're not going to get new LCA pins I'd stick with rubber bushings. The poly bushings tend to squeak if they aren't lubed on occasion, and that would require greaseable LCA pins. Plus, the poly bushings are a little different than stock, so the shoulder on the new greaseable pins (from Firm Feel, Hotchkis, etc) is also a little different to match the poly bushings better. I run the poly bushings in my cars, but I also bought new greaseable LCA pins to go with them. And realistically, for a driver, cruiser, show car etc, the rubber bushings are just fine. I probably can't even tell the difference in handling between a new set of poly's vs a new set of rubber bushings.
If you call them up, see if you can get them to substitute Moog 7103 offset UCA bushings in for the plain ones. You'll want those either way to put a real alignment on the car when you're done.