Hank, Try NHRA's website. Glen won the last two U.S. Nationals at Indy in Comp, 2006 in a 4.2 GMC, and 2005 in a 240 Ford. I'm sure a search will turn up many pics.
You're right buddy, The 4.2 is the next big thing in inlines. The king is dead - long live the king.
By the way NHRA has separate classifications for 2 valve pushrod engines like the 300 Ford and Double Overhead Camshaft 4-valves-per-cylinder engines like the 4.2.