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3.73s & 350

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by J.C.Staley, Aug 18, 2001.

  1. J.C.Staley

    J.C.Staley Registered Member

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    I was just reading the "My first Blazer" post below from thatK30guy and have a question now. I'm just finishing up replacing the 305 with a 350 in my 84K5. It sounds like I most likely have the 3.73 gear ratio. How's that going to work with the 350. We added an RV cam to the 350 to help with the pullling power. What's your thoughts?
     
  2. wayne

    wayne 3/4 ton status

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    What size tires you running. I would say that you will be fine up to 33's.

    <font color=blue>Wayne<font color=blue>
    <font color=blue>Happy Trails<font color=blue>
     
  3. mudhog

    mudhog THEGAME Staff Member Super Moderator

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  4. bigblue

    bigblue 1/2 ton status

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    I would say that you will be OK. But I wouldn't be so sure you have 3.73's until you check yourself. I thought I had 3.73's and really had 3.42's....just letting you know...

    Surfing is Life...
     
  5. J.C.Staley

    J.C.Staley Registered Member

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    Busy weekend and just got back. Tires I'm running are 33x9.50x15. They shouldn't stress things too bad.
     
  6. txbartman

    txbartman 1/2 ton status

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    You should be fine. It has more to do with keeping in the engines RPM power band that what size engine you have. With 3.73s and 33s, you are in the lower RPM of your power band or just below. You will notice more power than your 305 (just because of the 350), but you could recognize even more power and greater engine efficiency by moving more into your engines RPM power band.

    Brian
    Click to see <a target="_blank" href=http://tx85gmcguy.alloffroad.com> My 85 Jimmy </a>
    Is it a bad thing when my reality check bounces?
     
  7. RedDwarf

    RedDwarf 1/2 ton status

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    I have the 465/208 with 3.73 and 38x12.50 TSL.

    Works pretty good, granny low is waaaayy low: 64:1!!!

    Lift It, Lock It, LIVE IT!!!
     

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