1. L31 Vortec OEM pistons

    Tried to search for the answer, got hundreds of hits but nothing in the first two pages seemed to answer my questions. 1. Is there any difference in the pistons between a 1/2-ton specced Vortec 5.7L, and the 8,600+ GVWR 3/4--1-ton Vortec 5.7L? As far as I can tell, GM offers two...
  2. Lunati 60621 - Gen VI 454 Checklist

    New to the board. I have a 1971 Blazer that I am doing a frame off on, and found this board to be the best/informative when it comes to all things BBC! :thumbsup: I have a 1997 Vortec 454 with less than 2,000 miles. I've been doing a lot of research on this site looking on the best route to...