.....Thanks, I was afraid this is what I'd hear... BUT, better to hear it & not do it than to do it & be sorry! .... My HP is 460 now & TQ 499, so I guess with a bigger cam I'd pick up 40 + HP? And my Torque converter has a true stall of 3000 so it'd handle a bigger cam.... I now have a Edelbrock Performer RPM Air Gap manifold w/ a 750 double pumper. Would you recommend a Victor Jr.??? THANKS, Bill