You can buy just the cross members and add parts. Shop around, check the classic-truck rags, etc. If your truck already has a V8, I'm not sure if you need to do any cutting to install these parts, or you may just have to remove the front cross-member to add the new one. Bare cross- and spring-hat (weld-in) kits run around $300-$400 IIRC.
Good luck. Sounds like you have a great project.
Current fleet (subject to change w/o notice) \'49 GMC 3/4-Ton , 60 Austin Healey Frog-eye Sprite (some assembly required), 2011 Dodge Avenger, 2015 Jeep Cherokee. No, they don't all run. My other ride is a (B737)no, (B767)no, A320.... Update... was Embraer E190, now Boeing B787. Knowledge is a wonderful thing, but ignorance means you don't know you can't do something.
| 
