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  1. Rich77

    Anyone run 18” on your 2WD?

    Hello Everyone, My truck is a ‘77 C10 with a 2/4 drop. This is the wheel and tire combo I’m thinking of using. 285/60/18 rear with 18x9.5 245/60/18 front with 18x8 Does anyone think there’s an issue with that height of tire?
  2. Rich77

    Bolt pattern adapter

    Hello, Have any of used bolt pattern adapters? How do they hold up? Are there downsides to using them? I want 17x8 up front. That’s not a problem. I want 17x10 in the rear. I can’t get the rims I like in a 5x5(127). I can get them in a 5x114.3. Thoughts?
  3. Rich77

    Exhaust pipe bracket

    Hello All, Regarding the bracket that bolts to the inside of the frame- For those of you who have gone from single to dual exhaust or have needed to replace an exhaust bracket, what have you used or where have you bought one? I can’t find new oem style brackets. I thought that maybe I would fab...
  4. Rich77

    No spark

    Hello, My truck is a ‘77 c10 with 400/th350. The engine is rebuilt. Basically everything under the hood is brand new. First time trying to fire up the engine- Fill carb bowls, turn key, there was a “pop!” and just turn over without firing. I thought that maybe the timing was off. Went through...
  5. Rich77

    Steering Box Screw

    Hi Guys, I don’t know how this screw/bolt came off. I can’t find it. I think it’s supposed to be the adjusting screw. I’ve looked all over. Do you know where I can get a replacement? Thank you!
  6. Rich77

    Noob Driveshaft ??’s

    Hey All, My truck is a ‘77 C10 sbc400/th350. I need a driveshaft. I think I’ve confused myself. To measure the length of the driveshaft that I need, I measured from the trans housing to the yoke on the rearend. That’s 72.5”. That is how you measure your length, correct? When I measured...
  7. Rich77

    Trans kickdown and speedometer cable

    Hi guys, My truck is a ‘77 C10 sbc400/th350. The truck was fairly stripped when I got it. I’m confused about what kind of trans kickdown linkage and speedometer cable I need. There’s no trans kd linkage there. There are a few options, I think, online. There is an upper half of a Speedo cable...
  8. Rich77

    Distributor/ignition and wiring

    Hey guys, My truck is a 1977 C10 sbc400/th350 I have a Summit Racing "ready to run" billet distributor (Sum850205) and a MSD Ignition 8207 Blaster SS Coil. This is the distributor: https://www.summitracing.com/parts/sum-850205 This is the coil: https://www.summitracing.com/parts/msd-8207 Do...
  9. Rich77

    What is this harness?

    Howdy, My truck is a '77 C10 Scottsdale sbc400. What is the 4 wire harness on the right? When I got the truck the harness was plugged in but the end was cut off so there's just 4 wires hanging there. I don't know what it's called or what it was supposed to connect to. Thank you for any help!
  10. Rich77

    Engine temp and oil sensor- Noob questions

    Hello All, My truck is a '77 C10 Scottsdale Sbc400/th350. I think I've confused myself. Which oil pressure device do I need- an oil pressure sending unit or a oil pressure sensor? Can I use both? Does it depend on my gauges? Also, which temp device do I need- an engine coolant temperature...
  11. Rich77

    Making headers fit

    Hello All, As you can see from the pic, my headers do not line up with my heads. The headers are about 3/4” too short. Also the bolt holes don’t line up. Are there adapter plates available? Or should I cut the header flange into 2 or 3 sections? Thanks
  12. Rich77

    How to choose torque converter?

    Hi guys, Asking about my ‘77 c10 again. It’s got a 400 (406) and th350. This cam is in it- https://www.jegs.com/i/COMP-Cams/249/12-423-8/10002/-1 I have an Eaton posi with 373 gears. Is there a formula for figuring your torque converter?
  13. Rich77

    Serpentine belt conversion kit

    Hey guys, I’m putting together a 77 c10. It’s got a 400 (406 with a roller cam) and no plans for a/c. I’m thinking about putting in a serpentine belt kit. I don’t think I’m going electric water pump. I will probably go with a 3 row aluminum radiator. The original was rotted. One thing I...
  14. Rich77

    77 c10 lower control arm problem

    Hello, So I screwed up. I ordered 3/4 ton lower arms for my C10. As far as I can tell, they’re the same as 1/2 ton except for the lower ball joint. Has anyone reemed their spindle for the larger lower ball joint? Or Is there a 1/2 ton ball joint that’s a large OD to fit the 3/4 size? Any...
  15. Rich77

    Carrier & gear ?’s

    So if I have a 12 bolt truck rear with a series 3 carrier and I want to put in a 3.73 ring gear, then it has to be a thick ring gear and pinion set, correct?
  16. Rich77

    New diff for 77 c10

    Hi guys, I need to install a new differential in my truck. It will have 3.73 gears. Do any of you have experience with the cone type carrier style? Like this one- https://www.summitracing.com/parts/aub-5420105
  17. Rich77

    77 C10 cab work

    When I got this truck it didn’t the outer rocker backing plates (?) or inner rockers. They were apparently rusted off. I installed a new outer rocker on the LH side. The first image below shows the outer rocker installed with the outer rocker support (? If that’s what it’s called) semi in...
  18. Rich77

    Carrier ID

    Hey guys, Is there a chart online with carrier marking ID info? I’m looking for a carrier and have seen several but all I can get is the markings on the carrier and no other info. Any help?
  19. Rich77

    C10 to k5 rear

    Hey guys, Do you know if a 12 bolt out of a K5 will drop fit in a ‘77 C10? The C10 also had a 12 bolt. thanks!
  20. Rich77

    ‘77 C10 12 bolt to 14 bolt conversion

    Hi guys, it seems like it might make sense to change out my rear end. How much different is a 14 bolt full floating axle with 3.73 gears and posi (which is gt4 g80 axle code) compared to my C10 12 bolt? The 14 bolt is out of a 1989 GMC suburban c20 3/4 ton 2 wheel drive. Is it a drop in fit...
  21. Rich77

    12 bolt identification

    This is in my ‘77 C10. It is a 12 bolt. I’m trying to figure out my gears. I can’t figure out these casting digits. Do any of you know these?
  22. Rich77

    C10 wheels

    I’m about to the point where I need to look at wheels. I think I like the gun metal torque thrust style. I’d really like to go 11” wide in the rear but I’ll probably go 10” to prevent any extra tub work. Would it be weird to have 17” front and 18” rear?
  23. Rich77

    Noob leaf spring question

    I’m installing new leaf springs. The bolt that holds the leaf springs together sticks out of the nut pretty far. Because of this, the ubolt bracket won’t sit on the leaf springs. Do I need to cut the bolt down?
  24. Rich77

    Rear leaf shackles

    I’ve got a ‘77 C10. I have the bed off and I’m rebuilding everything from the cab back right now. I have new standard leaf springs and shocks. Is there anyone who sells adjustable stock height to 1” or 2” drop shackles? I may want to keep it stock height or slightly drop it. Can you drop 1”-2”...
  25. Rich77

    Home built wood engine stand?

    Have any of you guys built a wood engine stand? Does anybody have engine dimensions? I think I just need the width of the oil pan and the dimension of the height difference between the high and low point of the oil pan. Any ideas?

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