Here's something worth looking at: http://www.chevytrucks.org/tech/63-87_ifs_upgrade/index.htm

Haven't done it myself, just providing some reference material. There's a similar article somewhere using the entire late model frame but I can't find it right now.

Last edited by jfnar; 08/31/2018 7:19 PM.
'64 swb stepside (gone)
'57 1 ton
'53 phone truck
'59 swb
'46 1 1/2 ton
'68 swb gmc