GV is very strong. Some cars require slight floor modifications to make it fit. A friend of mine runs one with a M24 behind a blown small block that makes around 1000 HP. The GV has never caused any problems.
3.73What rear gears do you have?
Even with 3.31s I was able to use my 0.63 6th gear on the highway.
I need to switch to a smaller cam
My cam is 250/256 @.050 on a 108
It likes to surge at anything below 1700.
If I had something in the 231/231 range I bet it would be able to handle that .63 OD much better.
I thought I replied to this.. But I may try to richen it up to 14 like yours is. I currently run 14.8 which might be why it surges below 1800. I doubt it though, the cam is relatively large.Big cams definitely are tougher to work with at low RPM's in high gear. I wonder how much is the duration itself, and how much is the overlap. Plus I wonder if EFI could be tuned better at those RPM/loads vs a carb.
There is a mod that can be done to the case of the Tremec transmission that is supposed to make it able to be installed without having to cut the trans tunnel. There may even be info about the case modification on Silver Sports website. Probably can get better info about it from site members that have that done than you could from Silver Sport.
I've got a Blueprint 355, dyno sheet said 425 hp/tq, take it with a grain of salt I suppose, but that's what I'll tell you if you ask ;-)big block car with power down low? switch to 3.08 rear gear. small block car with that 450hp up high? switch rear to 3.42. Sounds like you have your Muncie all set up to go....it is a relatively easy swap on a 68-72 - especially the clutch junk... jmho....
I used the factory driveshaft in my 68 when I installed my TKO. I had it shortened to fit the new combo and I have yet to experience any vibrations at any speed. Granted the OEM shaft was in excellent condition and I took the time to check the driveline angles when I installed the transmission. Eventually I want to build a new driveshaft, but the OEM piece worked to get the car on the road for PowerTour.Yes, the factory drive shaft causes problems many time when using an overdrive transmission with low gears in the rear end. The drive shaft spins too fast and causes a vibration through the whole car.
I hear ya and the probability of highway travel its relatively low, so I'm inclined to run the M20. I live in the NE, which means winter is 6 months long, I don't get to put a ton of miles on my car every year. Fuel economy is not at the top of my list by any means, it's the 2800 rpm just to cruise the two-lanes that's making me hesitant. The cheapest way to remedy would be to just swap out the rear gear set for something taller, something to make the 60mph more tolerable.If you want better gas mileage and cruise speeds, get a 6 cyll Nova. just sayin
That doesn't really make sense. With a 5 or 6 speed one has basically the same gear ratios 1 through 4 as a 4 speed transmission so if fact it should be the exact same amount of shifting . The 4th gear ratio on a 5 or 6 speed trans is 1:1. The 4th gear ratio on a 4 speed transmission is 1:1My take on the 5 or 6 speeds is, shift, shift, shift, shift, shiftshiftshiftshsaeie[jaf'l;k AHHHH!
With a bunch of torque you don't need a bunch of gears.
If you want better gas mileage and cruise speeds, get a 6 cyll Nova. just sayin