Page 1 of 2 12 LastLast
Results 1 to 10 of 19

Thread: 3/8 dirt track SBC Engine

  1. #1

    3/8 dirt track SBC Engine

    Need advice from start to finish on this build. 76 Camaro is ready to go, now I need to build this SBC engine. I want to be competitive for my first year but I do not want to break the piggy bank. Can you tell me which block I need to start out with. Is a 70s to 80s 350 four bolt main just as good as a LT1 or Vortec block? I will need all the information that you can give me. Listed below is the rules for the street stock class.

    1. 362 cubic inch MAXIMUM.
    2. Stock production case iron heads only. No porting or polishing.
    3. Stock rocker arms only. No roller tip or roller rocker arms.
    4. Screw-in studs and guide plates allowed.
    5. After market camshafts are allowed. No rollers.
    6. Must pull 15 inches of vacuum at 1000 RPM’s. Vacuum to be pulled
    from base of carburetor or intake. Top three (3) cars will be checked
    after Feature Race. 12 Volt hookup for track tack required. Al engines
    must be turned off after vacuum test.
    7. Flat top or dished pistons only. Two valve relief piston allowed.
    8. Stock rods. (Example: Chevy 350 5.7 only. After market rod bolts
    okay).
    9. Stock aftermarket crank OK (No cutting).
    10. Stock HEI or point distributor. No supercoils or magnetos or MSD.
    11. Cast iron intake only. 2 or 4 barrel okay. No polishing!
    12. Carburetor’s spacer NOT EXCEDDING 2 inch IN HEIGHT.
    13. Mechanical fuel pump in stock location. Stock manual fuel pump. No
    electric or belt driven pumps.
    14. Headers or exhaust manifolds allowed. No 180 degree headers.
    15. Carburetor can be NO larger than Holley 500 CFM 2 barrel and must
    pass inspection from top side with gauge. (Must be stock venture 1 3/8
    inch). Choke horn may be removed.

    My email address is dale_matney@yahoo.com and I do thank you very much for any and all help.

  2. #2
    Senior Member RACING JUNKIE
    Join Date
    Mar 2003
    Location
    Fountain,MICHIGAN
    Posts
    856

    Parts

    Heres Exactally what you Need for Heads and Intake,AD#1681660.
    The Stuffs NOT Mine!
    But,TRUST ME?There S#!T WORKS!
    Later
    G 8)

  3. #3
    Anybody here run dirt track? Anyone willing to help. This is the same response that I got while I was hanging out at the track. "No one would talk". Anyways, thanks for your all time.

  4. #4
    Senior Member RACING JUNKIE
    Join Date
    Jan 2006
    Location
    La.
    Posts
    2,890
    I don't run a dirt track car, but have some ideas that may work. first the best chevy iron heads are the 441's and 492's casting but are a little had to find. Below is an article by the late John Linderfelter on those heads. Second, run the 4 barrel manifold with an adapter to a 500CFM 2 barrel holly carb, they work well. I'm not sure how much cam you can run and still pull 15" of vacuum, but i'm sure you'll have to have around 110/112 lobe ctr's. If you can find a stock steel crank use it, otherwise buy the cast steel after market crank, and what ever you do be sure to replace the stock rod bolts with good ARP bolts, use the 2 valve relief pistons and mill as much off the heads as you can to get the compression up. The 461 and the 492 heads are 64 CC's, put 2.020 intakes with 3 angle valve job. You could easily get 400 HP from this combo.Also use the 1.6 long slot rockers.

    JMO

    Zip.

    http://books.google.com/books?id=GUC...0heads&f=false

    http://cgi.ebay.com/ebaymotors/Steel...Q5fAccessories

    http://cgi.ebay.com/ebaymotors/3-Sol...Q5fAccessories

  5. #5
    Thank you very much for that information. I knew that there was still good people out here. I am ready to buy the block right now but I really dont know which is better. If you had to pick a 350 block what would it be and why. I hear alot about the LT1, Vortec and and older 4 boltmain from the 70s and 80s. Again, thanks.

  6. #6
    Senior Member RACING JUNKIE
    Join Date
    Mar 2003
    Location
    Fountain,MICHIGAN
    Posts
    856

    Block

    Any 010 Block is FINE for what you want!!
    I ran the Dirt for 5 Seasons,SUPER STREET.
    Later
    G 8)

  7. #7
    Thank you very much. Do I need to have it decked? If so, how much. Thank you.

  8. #8
    I have a chance to buy a 350 4 bolt main with the number 10066036
    Its a crate block for $100.00 Is that of good price and will that block be good for what I want? Thank you.

  9. #9
    Senior Member RACING JUNKIE
    Join Date
    Jan 2006
    Location
    La.
    Posts
    2,890
    I think that block will work o'k but the block that BBChevy was speaking of -010, has a casting # 3970010, that's the mid 70's, early 80's high nickle blk.

    Zip.

  10. #10
    Thanks for that information. I will find one of them. I hope.


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Email us - Support@RacingJunk.com
Call us - 866.326.9227
Copyright © 2005-2016 RacingJunk.com All Rights Reserved.

Designated trademarks and brands are the property of their respective owners. Use of this Web site constitutes acceptance of the RacingJunk.com
Terms of Use, Classifieds Disclaimer, Privacy Policy, and Cookie Policy