The stats are as follows. A 440 bored .30 over,Eddy RPM heads, Intake,600cfm carb, comp cam (mild), headers, 295/55/15s ET drags..in a 1968 B Body. Currently has a 2.97 open rear...ugh

I want to take it to the track occasionally (6x per season) and cruise whenever.

Is 4.10s too much for local street cruising. I might be trying to do too much but am in a pickle.. All comments are welcome..

well what cam? depends on the rpm range of the cam. and you'll need way more carb. I'd suggest a 750DP.

i just put some Nitto 275/60/15's on the back of my demon 27.75" tall now the 3.55 gear is kind of a dog i'm thinking of going 4.10 also i don't think it will be to bad on the interstate with a tire that tall, i rarely go for more that about 30min at over 65mph anyway.

Having been the route with many set ups - I would recommend for your application to go with the 3.55's. Being you will be mostly cruising, I also recommend a vac secondary carb like the 750 Holley vac. They will give the secondary usage when you need it most and not before,

Cam specs

213064 Big Chrysler 1800-5500 224/224 .470/.470

Do you have them yet? They do make 3.73's now. 3.55's will work but so would the 4.10's.

I had a 440 challenger with 4:10s. I was ALWAYS hitting the megashifter thinking I had another forward gear. I had 29" tall rear tires too. Your 295s are probably 26- 26.5" tall. With the taller tires I had I DID NOT CARE FOR THE 4:10s ON THE STREET. Go with 3:55s. (And your carb is too small for a perf 440)

I don't have the gears yet. My tires measure 27.8 inches tall so I am starting to understand where all this is taking me. I guess I can always upgrade to bigger gears in the future..

Your cam is mild and your tires are short. The 3.55 or 3.73 will do it. As said you don't have enough carb for a 440, especially one with aftermarket heads. If you're just cruising around town at say mostly 45mph and under, you can really drive with any gears. If you do highway cruising, that's where the difference is felt.

Ok, your talking a TORQUE monster 440, not a 318 here. IMHO for a 90% street/10% strip car with loads of torque, the 3.55's should get the job done. My 78 LRT came with a 3.55 Open 9.25 and it is ok but running over 3200 RPM at 60 MPH is the pits if driving over 25 miles. I must wear ear plugs if going any farther. It is compounded by having those twin stacks right behind the head. I could not live with anything like 4.10's without a OD trans. I will be putting a set of 3.21's with a SG in a 9.25 in my LRT soon. But I also have a 3200 RPM lockup converter that I will be putting in too. Now give me a A-518 OD and I may put in some 4.56's as that will get me back below 3.55's in OD.

My car with 4:10s I found "Not Fun" to drive where the speed limit was 55mph. We all know if the limit is 55 everyone is driving 60 and 60mph produced an RPM too high for me- for any distance.

Play around with this and then decide. http://vexer.com/automotive-tools/speed-rpm-calculator

Thanks Stumpy. That is real helpful. I went with the 3.55s. I'll let you guys know how it turns out...

I got that as a shortcut on my desktop.

3.91's

That is pretty neat STUMPY.

That's been around a while and the guy that created it just updated it recently.

Yep that calculator is a cool toy, I have played with it a lot!

I was thinking on the way in to work this morning...

How many here drove Super Track Pak cars back in the day? Or to open the playing field, any make of car with 4.10 or lower gears as a main source of transportation?

Other than the period when mileage was on everybody's mind, was anybody concerned about how many rpms were showing on the tach while tooling down the highway?

I was born in the early 70's, so obviously I was not old enough to experience it. I'll have to ask my Dad for his feedback this weekend. He always had some sort of musclecar back in the day.