67 Fairlane suspension help

[Muskratt2]

I'm building a 67 Fairlane for a heads up class.
The rules state:
* No wheelie bars.
* Bolt on stock suspension only.
* All suspension must bolt up in the factory OEM bolt holes with no relocation brackets. Cars equipped from the factory with transmission mounted torque arm may utilize an aftermarket front mount with bolt height as close to the OEM mount height as possible.
* Aftermarket rear anti-roll bars are the only non factory type or welded on rear suspension part permitted.
* Rear coil-overs not allowed.
* All vehicles must retain the full factory frame rails. Notching for rear tire clearance is permitted. Notches must be on outside portion of frame only.

I have a leaf spring rear suspension with a coil spring front suspension.
My question is what advice can you guys give me for this setup.
I don't want to waste money here I want proven results.
I've heard about clamping the leafs, does that work? How about trick front springs & drag shocks.
Any help here would be appreciated!