s10 frame swap
Heard back from scarebird.
they make the bracket for the 63 spindles. List the rotors as 77 Bonneville and calipers for 88-91 GMC 1500 PU. (bound to be exchanges for them).
I priced it out with used A frames and spindles, everything else new, including bushings, ball joints, rotors,hubs, bearings, seals, calipers, brake hoses, scarebird brackets, etc, looks like about $1,000.00
To rebuild my 41 with the same new parts would be that or more, and I'd still have crap.
About the only concern left is the offset on the spindles, making the front wheels too wide. You mentioned 69-70 disc brake assembly. You talking full size Pontiac? Ball joints the same, or doable? Maybe those spindles dont have as much offset.
I may be Ok with springs then. I cut 1 1/2 coils off. Most of that was too adjust for the SBC being lighter and further back than the orig. engine.