Bextreme04
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    • Bextreme04
      Bextreme04 reacted to Mark Jones's post in the thread 489ci tow build... with Like Like.
      It takes 2 hours porting per head, then the guide and valve job work. Then you're going to have a very responsive high torque engine. My...
    • Bextreme04
      Bextreme04 reacted to Mark Jones's post in the thread 489ci tow build... with Like Like.
      I think a set of 236 peanut ports properly done would the best choice. Depending on your elevation that would dictate the compression. I...
    • Bextreme04
      Bextreme04 replied to the thread Spark plugs.
      the second number is the heat range. Higher number is hotter plug. A CR43TS, CR44TS, and CR45TS will all fit and work in most GM V-8...
    • Bextreme04
      Bextreme04 replied to the thread 489ci tow build....
      Oh, and checking on a compression calculator... my L29 after the rebuild should be ~9.15:1 Static compression ratio and ~8.4:1 dynamic...
    • Bextreme04
      Bextreme04 replied to the thread 489ci tow build....
      Factory L29 and 8.1L are in the 9.0:1 range with the factory fast burn iron heads. You can run ~10:1 very safely on aluminum heads and...
      • Coil pack brackets.jpg
      • Deck height.jpg
      • L29 cam card.jpg
      • l29.jpg
    • Bextreme04
      Bextreme04 replied to the thread 489ci tow build....
      I would stay away from keith black pistons. By the time you acquire and rebuild any of those heads, you could have just bought better...
    • Bextreme04
      After some research I see that they didn't allow the 205 to pair to a TH400 until '79. Super weird. So if you had a TH350 or SM465 from...
    • Bextreme04
      Bextreme04 replied to the thread 489ci tow build....
      I am swapping my 350/TH400 for an L29/4L80. I just bought an entire 1997 K2500 Suburban that had the interior and suspension trashed for...
    • Bextreme04
      Odd to see a 203 paired to a TH400 in a 1-ton. Usually that would have been a 205.
    • Bextreme04
      Ended up grabbing some 2" Dom for the bull bar and some 1/4" 3x4 angle for the goose neck
    • Bextreme04
      Bextreme04 reacted to Catbox's post in the thread Paul's 1972 Truck... with Like Like.
      Tard-o didn't even post a photo of the cool work we did. He comes over for exhaust work and we end up doing all kindsa shish to his...
    • Bextreme04
      Update to my prior post: I called Miles Marker Tech Support and their -104 hub DOES come with an O ring (Post #27 was incorrect). It's...
    • Bextreme04
      Bextreme04 reacted to jumpinjak503's post in the thread New to GMSB from Oregon with Like Like.
      finally started putted $ and time into my 73' C/K 20 that has been in the family for almost 30 years now. mechanicals are all sorted out...
    • Bextreme04
      Bextreme04 reacted to Zelph's post in the thread Front shackle bushings with Like Like.
      See the first diagram and note the width difference with different bushing part numbers...
    • Bextreme04
      Bextreme04 reacted to K5Rob's post in the thread 04 LM7 into 87 K5 with Like Like.
      No doubt. Gotta be the most comprehensive one i’ve found yet. I appreciate you guys. I had my 700 all ready to go and i wasnt gonna look...
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