73 Duster Twister Guy

ocdart said
Welcome to FABO, Ted!
The 8.25 was fine behind a stock 318, but if you're planning a 'healthy' 408 I believe you're going to need to replace it with a tried-and-true 8.75 for longevity.

Yes ocdart is correct, 8.75 is the best for street an strip use. 742 case or 489 case. steer clear of the 741 case. The pinon shaft is to small.