You still have a four speed and only three usually work. You still have ? 50++ old bearings in your old rear end. You still have small rear brakes. You still have small universal joynts and a CLOSED driveline. It's a toss up if you have someone set up the 3.55 ring/pinion. I don't think I'd go w/ a 2.73 blazer rear end but if you live in the flatlands of america that's not a problem. Go to the hill country w/ a 2.73 (did NOT know blazers came w/ 2.73's) and you'll only use the first three gears of a T5.
Me, I'm only want to do it once, the first time, don't have the time nor $$ to rip it all out and do it again.
BUT if you have an sm420, the jeepers would want to buy it, and you can recoup $$$.
see
http://www.stovebolt.com/bboard/cgi-bin//ultimatebb.cgi?ubb=get_topic;f=2;t=010333;p=1#000000
but a 2.73 isn't listed in the above link.
but i do have a copy. in 5th you'de be running 1600 rpm @ about 60-61mph. If you come to a small hill you're back into 4th
:confused:
Something sure doesn't sound right, but to each their own. It all depends on the deals one makes and where the parts come from. See what fits you best. That's why I did the math and posted it for all to see. mid to late 70's GM 10 & 12 bolt have 6 lugs.
good luck and have fun!
http://www.smokemup.com/auto_math/mph_range2.php 28 inch tires - T5 Borg Warner
Tire Diameter 1: 28.0 inches
Rear Gear Ratio 1: 2.75:1
MPH
RPM 1st 2nd 3rd 4th 5th 6th
1000 10 15 22 29 39 0
1500 15 22 33 44
59 0
2000 20 30 43 58 79 0
2500 25 37 54 73 98 0
3000 30 45 65 87 118 0
3500 35 52 76 102 138 0
4000 39 60 87 116 157 0
4500 44 67 98 131 177 0
5000 49 75 109 145 196 0
5500 54 82 119 160 216 0
6000 59 90 130 174 236 0
6500 64 97 141 189 255 0
7000 69 105 152 204 275 0
7500 74 112 163 218 295 0
8000 79 120 174 233 314 0
Ps joker
i like your sign off...
