Poured-in-place bronze bushes?

[Pete O]

I've got one Stan! Remember the pic I posted of boring the front axle spindle a month or so ago-
   
but I can't see how I could bore this thing on the mill?
I really appreciate all the suggestions from you experienced blokes but I'm thinking that perhaps I have not explained the problem very well; I'll lay it out in detail. This is the loader frame:
   
It is 9 feet long and 4 feet wide and I estimate the weight at around 500lbs. The holes at the tractor end (at the right in the photo), where the frame pivots when lifted, are in excellent condition and don't need any repair.
The holes that have to be bored are at the end of the arms where the bucket is mounted, on the left in the photo. The holes have to be perfectly aligned across the  frame so that as the bucket is curled, or tilted, they function as a single axis. I plan to make a quick-attach frame so that I can swap the bucket for other attachments such as a log grab, forks, etc but the fact remains that the fulcrum points must be aligned across the frame.

It may be that the above was already obvious and that I am just too thick to understand the suggestions that have been made. I just can't see how I could mount that frame on the mill; I have thought about how I could possibly do it on the lathe- the bed is long enough to fit the width of the frame- but with the weight and size of the frame I think it would be too big a risk of serious damage to the lathe- also it would involve moving a lot of things out of the way, including the milling machine.

I've looked at a lot of youtube stuff on line-boring, shop-made as well as 'proper' industrial setups. Plenty of clever solutions and good ideas.
It may be that I can get my J-head rebuild completed and use it for this job before getting it mounted on the mill, good excuse for bumping it up the project list.

Again I really appreciate all the suggestions but either I hadn't explained the problem or I'm not understanding the suggestions- probably a bit of both.