Bmodel for truck pulling

[PBean]

I have a B model tandum with a quadreplex it has a blown up motor what would be a good motor (Turbocharged ) to put in it best for hookn to the sled any Ideas?and would the quadraplex work ?thought about the 237 or would a 350 work just curious of u guys input.Im not unopposed to any thing thanks

[ThaddeusW]

I have a B model tandum with a quadreplex it has a blown up motor what would be a good motor (Turbocharged ) to put in it best for hookn to the sled any Ideas?and would the quadraplex work ?thought about the 237 or would a 350 work just curious of u guys input.Im not unopposed to any thing thanks

Well if you plan on turning up the motor I would keep away from the quad/triplex/duplex gear boxes. The single counter shaft don't like gobs of torque and even putting one behind a 237 or 300 is not the best idea unless you're going to baby it. Sled pulling and babying dont belong in the same sentence. And as for motor, I dont think the 673 will like the tuning, probably run into head gasket problems. 711 is right out for tuning.

Get a 237 or 285/300 tip turbine, maxitorque strait 5 or 6 speed and start there. At the risk of enduring the wrath of fellow forum members I would also recommend looking into an Allison for serious sled pulling. A 350 E6 motor could be fitted with some modifications to fit the aftercooler, probably the best route.

[Lmackattack]

for ease of power upgrades... stock 285 or a 2v 300 with a tip turbine added. both will fit with front pully swaps . 237s will also work but the added cooling of a charge cooler will do a little better.

We pull with a 72 R model and have a 285/6 speed. does pretty good with just a wide open pump. Search "Last Call Mack" on you tube

[PBean]

Thanks thats the input i was looking for