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  1. J

    JB Weld on accessory bolt studs in aluminum heads?

    98 Z71 with a new 383 (390 technically - 3.8" stroke 0.040 over). It has AFR 190cc heads with a little more than 100 miles into break in. Runs perfect. Issue came up on final assembly two weeks ago that one of the accessory bracket bolts (AC bracket top outboard) started to pull out the aluminum...
  2. J

    Cam selection for 383

    Another cam thread. I have a short block SBC bored .040 over with a 3.8" stroker crank so technically 390, 9.6:1 CR. Going into a 1998 K1500 when build is complete (will be a while, late next year most likely). I haven't yet purchased the heads but it will have AFR 912s (aluminum, high flowing...
  3. J

    1998 K1500 exhaust upgrade

    I have a 1998 K1500 5.7L with a marine intake and cam with Gibson coated stainless shorties. Presently getting the 4L60e swapped to a 4L80e. Next and final upgrade will be exhaust in the Spring. Plan is to get a direct fit cat and catback for a K2500. Looks like there are two avenues for the...
  4. J

    1998 K1500 4L60e to 4L80e swap tuning

    Hi all, Final mod to my 1998 GMC K1500 in progress. As per the title it's upgrading to a 4L80e. I picked up a 4L80e and transfer case from a 1999 K2500 with a 5.7L which rotted out at 119k for a good price. Just in case the transmission is being rebuilt pro while I'm doing the transfer case. The...
  5. J

    Remove exhaust manifold bolts hot or cold?

    I have some Gibson shorties I want to install on a 1998 5.7L Vortec. Gibson instructions say very specifically to remove the manifold bolts only with the engine cold using penetrating oil. 1A Auto has a good video where the mechanic says to make sure to run to operating temp before you loosen...
  6. J

    4l60e to 4l80e swap question re transfer case

    I know that the output shafts on the 4l60e and 4l80e are different and by consequence the input shafts of their respect transfer cases. PATC makes a swap kit which is simple enough. But does anyone know if the transfer cases on a k2500 with a 4l80e vs a k1500 with a 4L60e are different other...
  7. J

    Scorpion 1035 and 1036 roller rockers

    Looking to spend some time and money to get me through the next few months and settled on changing to roller rockers. Truck is a well-running 120K mile 5.7L K1500 rarely driven hobby vehicle with the only significant mod to date a PCM 411. Scorpion seems a quality brand rocker based on reviews...

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