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I have a 1979 Camaro it has a 350 engine a i think its a close ratio ( on build sheet its says M22 code) saginaw 4speed and 4.11s with the 14" turbine rims. At 60mph im at about 3500rpm. What would be a good gear ratio so it can haul *** but also a highway driver, or would bigger rims and tires help? What would be a good estimate on how much it would cost. Thanks
 

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I have a 1979 Camaro it has a 350 engine a i think its a close ratio ( on build sheet its says M22 code) saginaw 4speed and 4.11s with the 14" turbine rims. At 60mph im at about 3500rpm. What would be a good gear ratio so it can haul *** but also a highway driver, or would bigger rims and tires help? What would be a good estimate on how much it would cost. Thanks
Simplest and cheapest change would be tires/wheels. A 30" tire will put you at 2,762 @60 mph. Be aware though, acceleration will suffer. Use the bottom part of this calculator to figure different sizes for yourself....
Engine RPM Calculator
 

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I'm not sure what the build code M22 is, it doesn't mean the car came with an M-22 Rock Crusher trans, they quit producing them in 1974 and they were primarily put behind big block performance motors. This link will help you determine what you have:

http://members.tripod.com/camaro_obsession/muncie.htm

Regardless, your final drive ratio is 1:1, Tech's link will help you figure out your rpm's at highway speeds. I will say, I have 4:11's with a 31" tire, it's not fun on the freeway over 55 mph for any length of time.
 

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I have a 1979 Camaro it has a 350 engine a i think its a close ratio ( on build sheet its says M22 code) saginaw 4speed and 4.11s with the 14" turbine rims. At 60mph im at about 3500rpm. What would be a good gear ratio so it can haul *** but also a highway driver, or would bigger rims and tires help? What would be a good estimate on how much it would cost. Thanks
I rarely cruise faster then 60mph so I'm kinda partial to 411's.
Those cars look excellent with a 275/60/15 tire out back, this gives you 60mph @3000rpm
 

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The 3.42 gear is pretty popular in those cars. That gives good performance and still not too bad on the highway. The 3.23 is also popular for cars that see more highway use. Many of the 4 speed cars that year got the 3.08 rear end with the ST10 transmission with a 3.42 first gear. I have one of those transmissions from a '79 Z28.
 

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M20, M21 and M22 are option codes NOT transmission models. My Holden customers go through this with close ratio M22-code saginaws. Years ago, I had one order a few parts and he and I were both very surprised when he had a Saginaw. Live and learn.

A close ratio Saginaw is...I think 2.54 1st / 1.80 2nd / 1.44 3rd / 1.00 4th
It should have 1 groove around the input, cut across the splines. No grooves is the 2.84 1st; 2 lines is a 3.11 1st, 3 lines is the 3.50 1st gear.

I would NOT use a 3.11 or 3.5 1st gear if you're beating on it; it WILL leave you stranded.

So; 2.54 1st, similar ratios to the Muncie M20 4 speed, but not as strong. I'd use a 3.55:1, 3.73:1 or 3.42:1
 
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