QA1 Six-Link Rear Suspension Conversion Installed
That QA1 rear suspension is well made. All in all its a great kit. Very tunable. Heavy duty construction.
I hate to tell everyone this but most shops are going to charge $1500 to $2000 to do a spring relocate & mini tub. If you want them to install a 4 link & mini tub that will be $4000. Narrowing a rearend is cheap @ $150. But, then you have to buy axles for $300... And modifying those stock rear stamped sheet metal rear frame rails? Or running stiff suspension on them? The weakest link on every car I've ever owned is the suspension mounting points. I've ripped more Swaybar mounts out of frames than I can count, control arm mounts were never made to withstand road racing...
Learn to weld this stuff yourself, or build your own parts. The QA1 rear suspension can be modified with a little work.