Just going to throw this out to the group to discuss. I see a lot of custom fabbed K frames and all use good thick steel but a lot of new cars are using a lot of aluminium in structural components such as the rio bar and front & rear K frames. There's obvious benefits in weight, but how realistic is it to be able to fabricate something that can handle the loads of the K frame out of aluminium? What are the main forces that the K fram is going to see in this aged body? I honestly feel like it is entirely viable using the correct thickness for a coil over application but I wonder if a K-frame that uses the stock style suspension such as the Q-a1 K, would be achievable? Would you need steel sleeves for the lower control arm pivots? Maybe captured bearings? I would think that heim joint / hinged and dampened strut rods (such as PST's) would be necessary. But the lower control arm pivots remains point of concern for me. Yeah I am contemplating building one, but its more long term for the moment. I'm mulling over improvements for 'Stage 2'.... And I enjoy fabricating & design challenges.