Old school slapper bars and stick shift

[Dana Fitzpatrick]

I recommend you buy them directly from Calvert Racing,cheaper and you get their first-rate tech service.

[GTX JOHN]

I agree with Dana. Calvert is outstanding!

I forgot he sold them (Senior Moment)

Make sure length is correct for you application.

[Larry Hill]

If length of shock is too short it will pull the wheel off the ground as it reaches full extension.

[Bill Diehl]

visualize the body separation....in your brain , take a picture, record it..whatever, now, disconnect both shocks, jack the car up to that point you saw on the hit and measure the mounting points then measure the shocks, ad 1" or 2" for the tire (does the rim hit the pavement) ect... and as the guy above said....make sure you have the correct application.... shock "extenders" were sold in the slapper bar era for a reason.

after all that now you can get the correct size, with adjustable extension so you can control it.....its that simple

[SGSST109E]

In the late 70's I had a 68 Camaro in C supermodified. 10 inch tire 28" tall. Has slapper bars when everyone had ladder bars. A 302 SBC with stock heads and a 750. Car went 10.90 @ 124mph with low 1.30 60'. I had a simple 50/50 shock. They need to be long enough as well.

[SSDiv6]

I cannot recall what the Waldo's ran in their Mustangs.
Nevertheless, if I recall, Jim Waldo ran slapper bars on his Mustang and that car hit hard in the starting line and ran fast.

[james schaechter]

Sounds like you need different tires as well. This sounds like a real torque beast. What gearing, clutch and trans? Launch rpm? If you added a hundred cubes and a stick, most of the things that worked before will have to be re-evaluated.

[rustang]

It made 540hp at 5600 and something like 520ft-lbs at 4500. It had a centerforce clutch that it was driving through. We just put a McLeod long style...forget the clutch disc off the top of my head.

Now the clutch is working well but the tires are blowing away bad.

I found an old pair of QA1's single adjustable on my shelf and we're going to try them this weekend. I never ran them, but at their highest setting they're very tight! He ordered some shock extensions, as it looks like the suspension is extending about 1" more than the shocks will allow.

[Dinsdale]

Calvert's Shocks are Rancho's but with his name on them. Since Ranchos are truck shocks there's no Mustang specific listing but he will give you the correct ones. They are listed for the front of some Import 4x4 as I recall.

The shocks will help but unless the front end has the usual mods you're probably fighting a loosing battle here. Even CalTracs won't be a fix all unless you have an adjustable clutch like a SoftLok. I have tried and done most everything and still can't leave much more than 4500 and I consider a 1.42 60' as being decent. My 390 ran a 10.18 @ 132.25 last year which tell me I need to leave harder.

And I agree with the others about tires. Don't think what you buddy has will get the job done.