Help choosing IFS/IRS install kit for 54

[jevonniespapi]

Have been learning a lot from this site for some time now, and just got the funds to finally get my 1954 Chevy Truck project under way. Im starting with the chassis, and wanting to build a roller. Its stripped to the frame, with 85' vette front and rear suspension waiting to be grafted in.

My question is: which "kit" to get to install the suspension pieces.
I've taken a liking to what Progressive Automotive has to offer, but am also considering Flat Out Engineering who sells the coil overs that must be dialed in.

Ill be running a LY6 6.0 with 4L80, fully boxing/reinforcing the frame.


Please give your advice!