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Recent content by 66fs

  1. 66fs

    SOLD Rear Sway Bar Mounting Brackets?

    Rear Sway Bar Mounting Brackets? $19 + shipping
  2. 66fs

    FOR SALE New Reproduction Big Block Dipstick Tube

    New Reproduction Big Block Dipstick Tube $10 + shipping
  3. 66fs

    FOR SALE 11 inch 23 Spline clutch Disc, Rebuilt

    Rebuilt 11 inch 23 Spline clutch Disc $29 + shipping
  4. 66fs

    302 Heads on a 318

    302 heads do not flow well in stock form. 308s will flow slightly better than X or J castings, but I gave up on finding any uncracked 308 castings years ago. I will not start with cracked head castings, I put too much time and money into my heads. X or J heads are fine with me. I am not a...
  5. 66fs

    302 Heads on a 318

    302 heads flow less or the same as what you have. 302 Heads are very prone to cracking. Nothing wrong with 675 head castings. I scrapped a lot of 302 heads to find a couple good pairs, only to have them sit on a shelf.
  6. 66fs

    Upgrading 73 Challenger with 318.

    Run the heads you have. 302 heads flow less or the same as what you have. 302 Heads are very prone to cracking.
  7. 66fs

    Upgrading 73 Challenger with 318.

    Another consideration is what do you torque ARP bolts to and how does that affect the stresses on the block and cylinders?
  8. 66fs

    Upgrading 73 Challenger with 318.

    The Direct Connection double roller was nothing special, probably just a stock OEM / Cloyes 340 timing set.
  9. 66fs

    Upgrading 73 Challenger with 318.

    You do not need a timing chain tensioner if you run a good double roller timing chain. I have a 273 with a Direct Connection double roller chain setup with 300,000 miles on it, installed in the 80's. As of today it only has 1 degree of stretch. No need to complicate things.
  10. 66fs

    Upgrading 73 Challenger with 318.

    The plan is a sound one. My son has a 73 Dart with a 318. For what you want, a cam change, new double roller timing set, four barrel carb (500 to 600 cfm) and intake, and better exhaust, can make a nice upgrade. I'd skip the heads as that opens up a bigger can of worms, but offers a...
  11. 66fs

    Carb recommendations / fit

    Well the OP hasn't posted since March 19, 2026. Hope we did not scare him off. As for your question, in very general terms there are 2 basic footprints for carbs. 1. Spread bore: ThermoQuad and Quadra-Jet + small triple venturi primary bores, large secondary bores, Air valve...
  12. 66fs

    Carb recommendations / fit

    First of all, we all need to stay within our comfort zones. If Holley works for you, go with that. I'm the Geek that walks through a swap meet, checking the numbers on carbs (original Carters) and don't need a book. Most people will be happy with any good 4 barrel carb. There are few new...
  13. 66fs

    SOLD 'Cuda 340 Emblems Nice Original Pair

    'Cuda 340 Emblems Nice Original pair $50 OBO + shipping
  14. 66fs

    Carb recommendations / fit

    I've run a ThermoQuad on 273's, 318's, 340's and 383 street cars. I don't need a wide band to tune an engine, been doing it for at least 50 years. The ThermoQuad was a staple of Stock and Super Stock racers since they came out, not that Drag Racing is anything I'd waste my time on. I wouldn't...
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