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  1. Madhorn

    77 K10 LS Swap

    Accomplished a couple things this weekend. I found out what part of my 50 mph vide was. Rear pinion pretension was loose. A quarter turn on the pinion nut worked wonders. Still need to have drive shaft checked out. I think the splined slip joint is worn out. Then I removed two leaf springs...
  2. Madhorn

    77 K10 LS Swap

    I have put about 500 miles on the 77 over the last few weeks. Average fuel mileage is 15.5 mpg. Not to shabby. Over that 500 mile run I did notice a slight vibration at 50 mph. I pulled the rear drive shaft and noticed that the u-joints were worn. The needle bearings were wareing grooves into...
  3. Madhorn

    77 K10 LS Swap

    Tires were mounted and balanced Wednesday. Drives and rides a lot better than it did with 12 year old tires it had on it. Hopefully I have time to get it cleaned up for a local car show tomorrow. Not that the truck itself is anything to look at, but I just want to show the engine swap.
  4. Madhorn

    77 K10 LS Swap

    Called my local tire dealer yesterday and tried to get a set of 35x12.5x15 BFG KO2s for the 77. They said it take two weeks to get them in. Not cool. So I decided to try Tire Rack. I called them yesterday at lunch time. They had them in stock and said they could have them delivered today...
  5. Madhorn

    77 K10 LS Swap

    Yes, Speed Engineering, part # 25-1025. I was concerned about the headers clearing the mechanical clutch leakage. These headers cleared just fine. The only fitment issue was an ear on the advanced adaptors bell housing, a little trimming fixed that. Over all very pleased with the headers.
  6. Madhorn

    77 K10 LS Swap

    Swapped out the leaky water pump today. Also found that the idler pulley has bad bearing. So need to pick up one of those and may as well get a new thermostat while I am at it.
  7. Madhorn

    77 K10 LS Swap

    No worries, that is what it had in it to begin with.
  8. Madhorn

    77 K10 LS Swap

    Actually, I am running a NV4500 (OD) on 35 inch tires with 4.56 gears. Once I get a new set of tires at the end of the month, I will be able to get it out run it at speed and see what my phone speed app says I am doing. For some reason my speedometer is way off, not sure why. The speed gear...
  9. Madhorn

    77 K10 LS Swap

    The engine is stock. Only significant mods would be exhaust and a lot of gear (4:56). 2k rpm is 60ish mph.
  10. Madhorn

    77 K10 LS Swap

    Right now I am running with stock tune from the donor vehicle. Seems to be running ok. But I am wondering how long I can go before I should get it tuned.
  11. Madhorn

    77 K10 LS Swap

    Is anyone using an HP tuner set up? I am considering getting one. Never seen one used in person. Are they difficult to use?
  12. Madhorn

    77 K10 LS Swap

    My short term exhaust fix is dual straight pipes dumping just behind the rear axle. It will work for now. My youngest son wanted to go for a drive, so we went to our deer lease 5 miles from home. He is getting pretty good with the manual trans. Picked up a water pump today. Will install...
  13. Madhorn

    77 K10 LS Swap

    Bummer! Found a puddle of coolant under the truck this morning. Water pump is leaking. That's whet I get for not installing a new pump when I put the engine together. Was hoping to get a few miles on it first. Oh well, no big deal. Just sets me back a bit on having the exhaust done.
  14. Madhorn

    77 K10 LS Swap

    I had to leave my engine in the stock location due to the mechanical clutch linkage. That puts the engine close to the firewall.
  15. Madhorn

    77 K10 LS Swap

    Did you set the engine forward during your installation??
  16. Madhorn

    77 K10 LS Swap

    I used some steel straps I found in a scrap bin at work.
  17. Madhorn

    77 K10 LS Swap

    Cleaned up the grill and bumper and painted brush guard. Even started cleaning up the wheels.
  18. Madhorn

    77 K10 LS Swap

    Fan shroud extension.
  19. Madhorn

    77 K10 LS Swap

    I ordered the auxiliary battery tray for my truck from LMC. Then mounted the air box to old battery tray on the passenger side. Yes I could have fabricated one but wanted it to look factory.
  20. Madhorn

    77 K10 LS Swap

    Interior is back together. All the gauges work! First time since I have owned it that the gas gauge has worked. All the lights in the instrument cluster have been replaced with LEDs. They look great but since they are LED, they no longer dim or brighten when turning the light switch. Now...
  21. Madhorn

    77 K10 LS Swap

    Drove the 77 to work last Monday. Everything was great going to work, but about half way home the right front tire started to vibrate. So I slowed down and nursed it home. Luckily the tire held together. It had a huge bulge in the tread. So now I am doing laps in the yard until I get...
  22. Madhorn

    77 K10 LS Swap

    It lives!!!!! Started right up and ran great. Even made one lap around the yard. Now onto the interior so I can run it down the road. I have a video, trying to figure out how to get it to down loaded to my computer. Will post when I do.
  23. Madhorn

    77 K10 LS Swap

    This is what I did with the steam line.
  24. Madhorn

    77 K10 LS Swap

    Thanks for the info. I was aware of some of the things you mentioned. But also learned a few things. That is what makes this forum great.
  25. Madhorn

    77 K10 LS Swap

    Using factory radiator and shroud. The mechanical fan is centered in the shroud better than it would have been. But it needs to be an inch or 2 forward. I intend on converting over to electric fans in the future. As far as engine mounts go, I used ICT Billet adapter plates using the...
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