Anyone ever heard of this? This is what I have been able to gather:
1. In 1971 the 232's deck height was increased and the stroke was lengthened to make the 258. All parts from the 258 and 232 are interchangable.
2. in 1987 the 258 block was slightly widened, bored over and de-stroked to create the 4.0L. All parts from the 258 and 4.0 are interchangeable (post 1987) and only a slight modification is needed to put the 4.0L head on a pre 1987 258.
If the 258 and 232 head is the same from 1971 to 1986, and the 4.0L head can be modified to fit the pre 1987 258's, then should it not also fit the 232 with the same modification?
Am I right? Is this a smart upgrade for my 232? Has anoyone heard of this being done before?
The 232 is in a 1966 Rambler Classic 2 Door Hardtop. The car and the engine both only have 60k miles on them, so they both are in amazing shape. I dont want to do any "major" changes to the car or engine since it is in all original condition, and I think the 4.0 conversion would be a good way to get some HP out of it, while not modifying it too much. I also picked up a 2BBL intake (off a 80's 258) to bolt a MC2100 onto it, and the TFI ignition system upgrade (it's all on the way, in the mail). If those two upgrades dont give me the extra power I'm hoping for, then the 4.0 conversion is going to be next (and exhaust to go with it).
Thanks for the links to those other sites. It looks like it has been done, and I look forward to doing it myself.
Cool project! There are also a couple of yahoo groups that you should check out. They are full of experts on AMC sixes. Unfortunately, I only have one of the addresses off hand, but if you search for amc six the other one should be easy to find. The first one revolves primarily around the 4.0 and 258, but there are some big rambler guys on there as well. Check it out....