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  1. Olds 307 and 403

    Possible Father and Daughter project, 88 Oldsmobile Cutlass Supreme Classic Brougham

    Well a great 5 hour round trip, 430 km. The 88 performed flawlessly, 165 to 180 temp, 45 psi steady cruising oil pressure at a steady 65 to 68 mph, around 2000 rpm. My Optimum Grey fix on the cruise servo fixed it, now rock steady, no more surging up and down. The best part, 24 mpg Imperial. I...
  2. Olds 307 and 403

    Big block install in a G body

    Good idea choosing someone who knows the BBO.
  3. Olds 307 and 403

    Possible Father and Daughter project, 88 Oldsmobile Cutlass Supreme Classic Brougham

    So I have been enjoying the hell out of driving my 88 Cutlass. Good power and remembered what the issue was with the throttle sticking, the cruise control rod is the issue. I removed it but plan on putting it back on for the 5 hour round trip this weekend. It was surging a lot so I will reseal...
  4. Olds 307 and 403

    Big block install in a G body

    Who did the motor for you? You can do a link if you have a You Tube account.
  5. Olds 307 and 403

    Big block install in a G body

    Use the Holley 870 you have, already tuned to your motor. You could add the air flow top to help negate the 2" drop base or cut a hole and add a scoop. I would say a Qjet is on the small side for that monster. Obviously mileage is not this car's main priority, impressive numbers btw.
  6. Olds 307 and 403

    Big block install in a G body

    Good, the set I saw pics of on Classic Olds looked shitty in the ports and didn't fit great on a 75 Cutlass. For their price, they better be perfect.
  7. Olds 307 and 403

    Big block install in a G body

    What carb and air cleaner are you running? You will probably need a 2" drop base air cleaner.
  8. Olds 307 and 403

    Big block install in a G body

    The fit looks really good on the ARH headers. What primary tube size are those?
  9. Olds 307 and 403

    Possible Father and Daughter project, 88 Oldsmobile Cutlass Supreme Classic Brougham

    The car runs great, runs hard for what it is and earning its name. There is just one issue the throttle is sticking after WOT runs. Not every time but too often. I am running the factory Dualjet dual return spring bracket. I wonder if the cable is catching some how or if the gasket is hanging up...
  10. Olds 307 and 403

    Thoughts on a short term trans behind healthy torque, a 2004R or TH350?

    I am probably going to do the 2004R. Being an 86 it should have the hardened sun shell so that might get by. I will do a billet foward drum with a welded on shaft, CK shift kit and servo along with their pump. Last pump I did, I struggled to hit 220, their reman pump should hit 295. I will know...
  11. Olds 307 and 403

    Thoughts on a short term trans behind healthy torque, a 2004R or TH350?

    As I move closer to building my 424 SBO, the motor itself doesn't bother me as much as the trans and rear. I know the motor will be 400+ HP and 500 ft/lbs. My long term goal to lay down the hammer on all but the highest power modern muscle cars is a beefed up 2004R with billet parts and 3.90...
  12. Olds 307 and 403

    Big block install in a G body

    I would go with a Trutrac, no tiny spider gears to fail. Also 28 spline Moser axles are a good idea.
  13. Olds 307 and 403

    My 1970 Oldsmobile Cutlass S

    I will pressure wash the block and clean out all the passages with brushes after machining. This shop has done Olds before. My coworker had his 455 done by them from a 72 Delta 88. It had low oil pressure so he sent it there. It ran hot in his second gen Camaro but no more oil pressure issues.
  14. Olds 307 and 403

    My 1970 Oldsmobile Cutlass S

    So 302 main studs fit an Olds 260 through 403, 1 through 4. I am not too worried about 5 being 1/2" bolts, no doubt similar in strength to the ARP 1 through 4, 7/16" studs. I have actually cracked a cap going to 130 ft/lbs but not broke a bolt, that torque wrench read 10 ft/lbs high, found that...
  15. Olds 307 and 403

    Big block install in a G body

    Sort of, I had issues securing the passenger side. I am currently using that truck sbc setup with Extreme Supreme's adapter brackets on my 88 Cutlass, much more secure. Pacific G body also has a set. The diesel rwd V6 reverse rotation water pump is needed to complete it along with a complete...
  16. Olds 307 and 403

    Big block install in a G body

    A lot of guys agree with you, I don't, I like the Olds V8 in everything 😁. People have yanked out perfectly good V8's of all makes and replace them with the sbc or ls because they are cheaper and better in their minds. I put an Olds 307 in my 78 1/2 ton, out performed two sbc 350's with 2.78...
  17. Olds 307 and 403

    About engine wireing harness

    First thing is what gauges do you have? Was it a factory sbc car?
  18. Olds 307 and 403

    Big block install in a G body

    I think I remember you from the old forum. Unfortunately a lot have moved on from Olds power and now run LS😕. Glad to see you are not one. Looking foward to your progress.