unit91

How much of a difference in acceleration and cruising speed between the 200 and the 289? I'm assuming the 289 wouldn't be pushed as much on the interstate as the 200?

1slow67

Pretty good difference if your I6 is stock.

Boogie's_AutoRama

Night and Day difference.
But you're comparing apples & oranges.

Nothing wrong with the I6.
More than enough power to scoot down the road. Mine with the six in it cruised down the highway effortlessly.

But my convertible ain't a hotrod so I wasn't concerned with acceleration.
While crusin' for chicks at the beach it got the job done.

The only real problem I had with the six was idling with the A/C on. Could really bog down the motor. I fixed that by swapping out the 2-groove compressor pulley with one of those heavy flywheel jobs.
Helped quite a bit.

unit91

Well, I have 4/40 A/C (4 windows down @ 40 mph) so I won't have to worry about that. The I6 is enough power for me, but I have noticed that when I have 4 adults riding it really makes it sluggish. I re-inspected my leaf springs and bushings and I found that I have one lower shackle bushing where the bolt has worn all the way thru the rubber and is sitting on the spring. Dangerous???

67mustang302

Yes, that's dangerous. The shackle can break. Though, breaking a rear leaf/shackle the car can still be driven, you don't want it to break while driving.

unit91

I've checked Mustang Monthly, Average Joe Restorations, and several other sites for instructions on replacing the leaf spring bushings, and I have not been successful. Do you now of a site I can check?

120mm

One thing you should look at is your distributor. I think 68s still had the Load-O-Matic, and if yours still has that, that might be your problem.

The problem with the LOM Dizzy, is that it has no mechanical advance, and the vacuum advance is a Mickey Mouse/Rube Goldberg Piece of Steaming Dung.

Make sure it is advancing correctly; when I messed with mine, it's like someone put another engine under the hood.

unit91

Will do.

1970

i tossed my poly bushings in the garbage after one ride with them they made so much noise

67mustang302

They need to be properly greased, I prefer anti-seize, lasts forever and works better than the Teflon tar that they advise.