alright so what I've found is that the L31 was the last gen of the old 350 small block. It was also named the vortech 5700. It was used in silverado trucks from 1996- to the silverado generation change in around 2000. This appears to be the 350 I would want to find if I went that route. It would already have a roller cam and vortech heads. Potentially allowing me to make a powerful budget motor. Motors in silverado's between 1987-1995 are a gamble. From what I've read the engines did not have vortech heads, and whether or not they were probably setup for a roller is complete hit and miss. Also when looking for silverado's with the vortech car craft says to avoid the cast # 10239906. It has hardened exhaust seats that limit flow supposedly. If anyone can validate this info that would be great.
Would you guys agree that going this route to achieve around 420hp would be much more affordable than a comparable 400 build?
Last edited by usaweapon777; 01-08-2012 at 09:14 AM.