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anyone have a good setup for a 305?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by tightwork 82 K5, Nov 1, 2001.

  1. tightwork 82 K5

    tightwork 82 K5 Registered Member

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    I am thinking of rebuilding the 305 in my 82' rather than buying a new 350 ... i was thinking of the rebuild kit in summit, it has new pistons, rings, gaskets, freeze plugs. does any one have some info on a intake/cam kit, and how about some headers as well? just shoppin through summit a racked up about a 1000 bucks on a rebuild. I would like to stay in that price range. what is the hp of a stock 305???

    Tell the truth and you never have to remember what you said!!!!
     
  2. HarryH3

    HarryH3 1 ton status Author

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    Don't forget the cost of machine work. If you're going to spend the bucks on new parts, you should also spend some on having the block cleaned, bored, honed, etc. If you're going to keep the stock heads, they will need some work as well.

    Most of the things that will pep up a 350 will also pep up any other Chevy small block. [​IMG]

    But for around $1,300 you could have this brand new 350:
    <a target="_blank" href=http://www.sdpc2000.com/cart.asp?action=prod_detail&amp;catid=130&amp;pid=383>http://www.sdpc2000.com/cart.asp?action=prod_detail&amp;catid=130&amp;pid=383</a>

    <font color=black>HarryH3 - '75 K5</font color=black>
    <a target="_blank" href=http://www.angelfire.com/super/ThunderTruck>www.angelfire.com/super/ThunderTruck</a>
    It's a great day to be alive...
     
  3. RedDwarf

    RedDwarf 1/2 ton status

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    305's thin cylinder wall casting generally doesn't allow boring over .030".

    350 rebuilld kits are cheaper than 305. You'd probably get off cheaper getting a core 350 and rebuilding it. If it was me though, I would just try get a 350 crate. Power is so much more from a 350, and I think most 350"s gert better gas mileage than 305"s

    Still Poundin' "pavment" after all these years!!! [​IMG]
     
  4. Mr.Chevy4x4

    Mr.Chevy4x4 1/2 ton status

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    If you decide to go with a rebuild, check out <a target="_blank" href=http://www.naparts.com>NAParts</a> they have great prices on good name brand parts, and excellent service. No, I'm not being paid to say this, just a happy customer.

    '85 K5 : Run it til it breaks, then fix it and go again!
     
  5. elkboy

    elkboy 1/2 ton status

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    The best setup for a 305 is on the end of my anchor chain [​IMG]. If your going through that work, I would go to a 350.

    <font color=red> Elkboy </font color=red> 82 K5 fuel injected H.O.305, TH350/205, 14bolt/10bolt and 39.5 TSL's.
     
  6. K10ANDYKHAMNIC

    K10ANDYKHAMNIC 1/2 ton status

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    305s thin cylinder walls ? haha sure .....woo hoo a whole 20 hp difference .....350 plah

    WHATS WRONG WITH A 305 ?
    81 K10 GOODYEAR 35" MTRS
    TH350 NP 208
    O R D's axles
    NO BREAKAGE :)
     
  7. i also agree with going to a 350. if your going to spend the money, might as well get a few more cubes too. all your accessories will bolt up. you can find buildable cores for next to nothing.

    <font color=blue> Experience enables you to recognize a mistake when you make it again.

    </font color=blue>
     
  8. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    <blockquote><font class="small">In reply to:</font><hr>

    305s thin cylinder walls ? haha sure .....woo hoo a whole 20 hp difference .....350 plah

    <hr></blockquote>
    <blockquote><font class="small">In reply to:</font><hr>

    WHATS WRONG WITH A 305 ?

    <hr></blockquote>

    Sounds like 350 envy to me...[​IMG]

    Just buggin ya a bit dude!

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
    <a target="_blank" href=http://coloradok5.com/gallery/project_T2> tRusty pics...</a>
     
  9. K10ANDYKHAMNIC

    K10ANDYKHAMNIC 1/2 ton status

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    didya watch the balzer safari video ? ... nuff said ..

    WHATS WRONG WITH A 305 ?
    81 K10 GOODYEAR 35" MTRS
    TH350 NP 208
    O R D's axles
    NO BREAKAGE :)
     
  10. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Just buggin ya a bit dude!

    I guess I should have left that part out if you were gonna get offended anyways.

    Oddly enough I didn't see any 305's at TTC...[​IMG]

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
    <a target="_blank" href=http://coloradok5.com/gallery/project_T2> tRusty pics...</a>
     
  11. Mr.Chevy4x4

    Mr.Chevy4x4 1/2 ton status

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    305 cylinders are so small that you can't run big valve heads without clearancing the block, and then the valves are shrouded and performance suffers. I would never build a 305. 350's are too plentiful, cheaper to build, and produce more power. My $.02

    '85 K5 : Run it til it breaks, then fix it and go again!
     
  12. tightwork 82 K5

    tightwork 82 K5 Registered Member

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    well i changed the oil in the ol 305 today and added grease lightining engine treatment. I could notice a difference. it stil smokes blueish white but not as bad . i guess i will run it til it dies. may get a few months or a year, or maybe a week out of it. that scoggin dickey 350 looks good, can i use my 305 bolt ons on it?????? ie. distribiter, water pump, altenater, starter, power steering pump?????

    Tell the truth and you never have to remember what you said!!!!
     
  13. Mr.Chevy4x4

    Mr.Chevy4x4 1/2 ton status

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    Yep, everything will bolt right up.

    '85 K5 : Run it til it breaks, then fix it and go again!
     
  14. Hossbaby50

    Hossbaby50 3/4 ton status

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    You need a new flexplate don't you. My Dad swapped the stock 305 out in favor of a new GM crate 350, and it was well worth it. The 305 that was in my Jimmy was a dog. I had the 230HP crate, it was good, but now I got the 300HP crate w/MSD ignition and dual exhaust. Now I can pass people going up hill and accelerate going up hills. The 305 would barely do 45-50 on long uphill grades, now I can do 65-70 no problem. The 350 is well worth the money.

    My Chevy isn't broken, its just out of gas.
     
  15. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Depends on what you have now and what you get whether the flexplates are the same. The newer style motors with one piece rear main seals use a different one.

    As for the 305 vs. 350 game. I'll be a little bold here and say I've got the hottest 305 on the site. DD 2000 says that it's 250 HP. That's not bad for a 305. It's a long story how I ended up having a motor in my hands with less than 3,000 miles on it for $100, but that's what I've got. A few add ons and $400 later I've got a 305 that will run with and, in most cases, run away from any stock 350.

    However, if you don't get the kinda deal I got, get a 350, you'll be much happier.

    Tim
    '84 Chevy K10, lifted, loud, fast, and 3/4 ton axles
     

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