Blazer suspension swap, 1977

[General23cmp]

I just purchased a 1971 K5 Blazer project, and the guy said he swapped the front and rear suspension with a 1977. I cannot see where anything was modified, but if I read correctly, this suspension/springs would not have bolted right in (maybe different length springs or widths…not sure). I cannot get back in touch with him easily. What options are there to do such a swap so I can get a better idea of what he did here? Would old springs bolt in, and then it be bolt in? Would perches have to be moved, and if so, which ones and which direction?

It looks factory as best I can tell, but I know it’s not. Thanks.

[1rippen6]

Is it possible he just swapped axles and not the springs?

[best view]

Pictures would help

[General23cmp]

Originally Posted by 1rippen6

Is it possible he just swapped axles and not the springs?

I was able to get in touch with him. He said he reused the 71 springs which makes sense on it looking untouched. Would the 77 axles have the spring mounts in the same location as 1971? He owned it for 30 years and said he didn’t recall changing anything except the staggered shock mount on the rear.

[1rippen6]

Originally Posted by General23cmp

I was able to get in touch with him. He said he reused the 71 springs which makes sense on it looking untouched. Would the 77 axles have the spring mounts in the same location as 1971? He owned it for 30 years and said he didn’t recall changing anything except the staggered shock mount on the rear.

I know the front is definitely the same width and I'm pretty sure if the rear came out of a blazer then it's the same also.

[A1971Blazer]

I put a GM 10 bolt front axle out of an '87 Suburban in my '70 Blazer...itbolted right in

[General23cmp]

Originally Posted by A1971Blazer

I put a GM 10 bolt front axle out of an '87 Suburban in my '70 Blazer...itbolted right in
Attachment 2348137

And which springs did you use? Have to use the 70’s?

[A1971Blazer]

Originally Posted by General23cmp

And which springs did you use? Have to use the 70’s?

I actually used Tuff Country EZ-ride springs that are for 69-72 Blazer/K10 pickup
They are the same length as the factory springs.

[General23cmp]

Originally Posted by A1971Blazer

I actually used Tuff Country EZ-ride springs that are for 69-72 Blazer/K10 pickup
They are the same length as the factory springs.

Thanks