What should I do?

Discussion in 'Street/strip 400/430/455' started by johnriv67, Oct 1, 2019.

  1. johnriv67

    johnriv67 Well-Known Member

    833252EB-0293-419F-8ECC-24B00854D31A.jpeg 0FE257D6-F602-4237-9FC8-2E31F23E6BBE.jpeg

    I have been offered these ported heads that have been sitting in a shed for 3-4 years, with light surface rust forming in the runners.

    In their prime they flowed 280 @ .550 on the intake and about 170-180 on the exhaust. They are Stage 1 replacement heads that have not been cut on the intake side, but were decked .040. Chambers are 64cc and the heads were used for 8-9,000 miles before they were removed.

    What would you recommend I do to get these heads ready for the street once again on a very tight budget?
     
    Last edited: Oct 2, 2019
    Donuts & Peelouts likes this.
  2. Julian

    Julian Well-Known Member

    Go for it... Just surface rust...make sure the valves can still move
     
  3. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD"

    Those heads look ready to bolt on to me. Wipe out the runners with cloth and carb cleaner.
     
    TexasT likes this.
  4. 1969RIVI

    1969RIVI Well-Known Member

    X2 on the above statements^^^
     
  5. Gallagher

    Gallagher Founders Club Member

    X3 ^^^
     
  6. TrunkMonkey

    TrunkMonkey Well-Known Member

  7. Schurkey

    Schurkey Silver Level contributor

    "I" would stuff fresh valve seals on them, which gives me a chance to inspect the springs, shims, keepers, retainers, guides, valve stems, valve faces, and valve seats. With "everything" removed from the castings, I'd look 'em over for cracks.

    Scrub a wire toothbrush in the ports to remove any loose rust.

    Assemble with fresh lube in the guides

    Wipe 'em down with some kind of solvent--lacquer thinner, mineral spirits, etc. Paint as desired.

    Bolt 'em on. What are you using for rockers and rocker shafts?
     
    johnriv67 likes this.
  8. Stevem

    Stevem Well-Known Member

    If your running a stock Intake Manifold just note that they do not flow anywhere near even 270 cfm so if you bolt those heads on don't expect a really major power increase.
    In fact you will find that within the amount of added power that those heads will make, that now your rpm range where peak torque comes and in then noses over will be smaller!

    In a full on race car this trend is delt with by rear gear changes which may not be in the overall picture you have for your car.
     
    johnriv67 likes this.
  9. johnriv67

    johnriv67 Well-Known Member

    67 Rockers ands rocker shaft. Thank you for the in depth advice
     
  10. johnriv67

    johnriv67 Well-Known Member

    It’s a stock 67 intake manifold, so I suspect I would have to do some runner work and cut down the divider. What would you recommend?
     
  11. 1969RIVI

    1969RIVI Well-Known Member

    Get a performer or b4b intake
     
    Mike B in SC likes this.
  12. johnriv67

    johnriv67 Well-Known Member

    Or an SP-1 and say hello to drop base air cleaners
     
  13. 1969RIVI

    1969RIVI Well-Known Member

    Our Rivs are extremely tight on hood clearances. Maybe ask around to see if someone used an SP1 and a drop base in a Riv before. I don't think it will work without cutting a hole in the hood?
    EDIT: If I'm not mistaken didn't you buy a performer intake not to long ago John??
     
    Last edited: Oct 2, 2019
  14. johnriv67

    johnriv67 Well-Known Member

    I tried to buy a performer but the owner found that his new "stock" intake wouldn't fit on his current engine, so he kept the performer and I got my money back.
     
  15. johnriv67

    johnriv67 Well-Known Member

    After doing a bunch of calculations, I will be running right at 10.17 SCR and 7.96:1 DCR assuming that my timing chain has not stretched at all over 1000 miles. I am worried because that is the ragged edge of detonation and I am running *approximately* .070 quench on this 430 due to the .050 or so in-the-hole pistons and the .020 steel shim headgasket. What should I do, once again?

    However, if my timing chain has stretched a little, even 2*, then my DCR drops to 7.83:1, which seems much safer.

    I have felpro .040 headgaskets available to me to use, but that will simply drop static compression down to 9.75:1 and DCR to 7.64:1 and now my quench is .090, which seems even more undesirable.
     
  16. TrunkMonkey

    TrunkMonkey Well-Known Member

  17. johnriv67

    johnriv67 Well-Known Member

    Thank you for the offer Mike, I'll certainly look into it more. I was actually excited about the timing chain maybe getting a little looser for more retard and potential power up top, as well as less DCR, so I will want to stick with my current timing gears.
     
    2dtrak likes this.
  18. johnriv67

    johnriv67 Well-Known Member

    6B0FEAF9-21B2-48C3-8FE6-FD5D2EAC12CE.png I found this for sale near the heads. I will aim to pick them both up in one fell swoop. Seller is saving it for me.

    Would that be a good decision?
     
  19. PGSS

    PGSS Well-Known Member

    Just having it on a shelf for maby using later on it's win win..
     
  20. johnriv67

    johnriv67 Well-Known Member

    If I have it I’m using it now, gonna eek out every horse, within reason, of this 430.
     

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