66 barracuda

I would say the motor city resin 66 barracuda kit is the best bang for your buck. Specially if you are wanting to build a formula S for that's what the kit is based on. The coolest part about that is you will get the commando valve covers which are only found in the motor city resin kit, no kit has ever had them before. Besides that you also get an updated chassis, its a modified revel 69 dart chassis to fit the 66 barracuda. This also gives you separate inner fenders, firewall and radiator support. You can find original rebuilders on Ebay and such but for what you will pay you are most likely going to be better off with the motor city one in the end.