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  1. gumper

    Pulling oil pan

    Can the oil pan on a 360 in a 70 Duster be pulled without lifting the engine, or pulling the engine out completely? Want to put a deeper pan on, but if the motor has to lift out then I won’t bother for now.
  2. gumper

    Reusing rods

    So my engine is at the machine shop, and the guy there told me I should buy new rods for my 408 rebuild. Said that by the time I spend the money on new bolts (proprietary to Scat) and have the rods resized I could just buy a new set of rods. First I wondered if I truly need new bolts to begin...
  3. gumper

    Header upgrade

    Thinking of upgrading my 1 5/8 Hooker Competition headers while my engine is pulled. Curious if there would be a significant power increase by using a larger primary tube setup. This is what I have: 408, around 11.6:1 Ported Performer RPM heads 65cc chambers, 270/232 @.500, 280/240 @.600...
  4. gumper

    Compression and leak down tests

    Had big plans to refresh my 408 along with a new trans, and spring move/mini tub. Decided to buy a TIG welder over Christmas, which really cut into the budget. In order to do the other two projects I decided to see if the engine was still healthy. Ran a compression test, and had 160 psi on all...
  5. gumper

    Rebuilding my 408

    Time to pull the 408 from my Duster and freshen it up. Going to do the basic rings and bearings, bigger solid cam (finally) and switch to methanol (finally). I have a few certificates for bearings from Clevite 77. Anyone recommended a certain series from them? Not sure if I want H or P, full...
  6. gumper

    Exhaust backfire (BIG BOOM)

    Washed my car tonight so I could load it on the trailer and just head out to the races right after work. Went to start it after it was dry, and it kicked but wouldn't fire. So I pumped the throttle once, cranked it but nothing, pumped it, cranked, pumped once more and BOOM! Sounded like a cannon...
  7. gumper

    Oil filter cut apart after break in

    Fired up the 383 SBC for our dragster, ran it for about 30 minutes total including 3 heat cycles. Checked the valve lash, changed oil filter and loaded it in the trailer. Cut the filter apart with our brand new filter cutter and almost had a heart attack: None of the particles are copper, or...
  8. gumper

    Head install

    Putting my freshly ported heads back on the 408 today. Using ARP bolts. Which bolts need sealant? Which ones should I use ARP lube on? I plan on torquing them 45-65-95 as well.
  9. gumper

    Yet another comparison (air-gap carb spacers)

    Put the air gap back on. Decided I'd port-match it before the 3rd reinstall. I usually run a 1" open wood spacer with the AG. I have a 1/2" oval split spacer I want to try out to see if it jives better with the split manifold design. I've read a lot of 'talk' about the differences, but no actual...
  10. gumper

    Stumped

    So I put the super victor back on the 408 in place of the air-gap. The stuttering problem is still there. At WOT it stutters for a few hundred rpm then takes off, stutters then takes off. It idles and cruises fine. The timing is 35*, bigs 750 with 92-95 jets with both power valves blocked (tried...
  11. gumper

    Intake ports and silicone

    After the debacle at the track where my new intake wasn't sealing and I had to swap them in the pits the morning of a big race, I talked to some fellow racers to get tips. 8 out of 10 said the put a thin layer of sealant around their intake ports to make sure everything seals right. Anyone here...
  12. gumper

    Super victor clean up

    I had a gift certificate to edelbrock that was going to expire this month, so I cashed it in on a super victor intake. I've knocked off the rough casting spots with a file, but there's some spots around the carb flange that kind of rolls under I am questioning. Should I grind the spots flush...
  13. gumper

    Mopar cam lash question

    I have mopar purple shaft cam P4120655. The lash is supposed to be .028/.032. I've asked this question a few times, but figured I'd ask again since it's that time of year to check for any needed adjustment. Can I tighten up the last and gain any power? .028/.032 always seemed very loose to me...
  14. gumper

    Edelbrock valve spring replacements

    I'm running the edelbrock performer rpm heads on my 408 with a craptastic purple shaft cam. I want to change cams to a Voodoo roller with .600 lift, but have to change springs since the max lift with the installed ones is .575. Do I have a direct replacement spring I can buy and install without...
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