MORE RPMs

[COBRO]

Howdy all this is my first post and this is the best site Ive found for tall hoods. Ive replaced the 402 in my 72 C-20 with a 454 and replaced the M465 with a th-400 with a GV-OD on the end of that. The engine is a .030 over just rebuilt with an Edelbrock performer cam,Edelbrock performer manifold and a 750 Edelbrock AFB. Hedman headers and 2-1/2 exhaust to the rear bumper.I put in a B&M torkconverter and the 400 trans is a fresh rebuilt.This setup is mainly for towing a travel trailer. I was turning around 2700 rpm with the 402 and stick shift at 60mph - now after getting it on the road its turning 3000 rpm at 60 mph. The rear end gearing has not been changed - still 4.10 as it was before. I cant figure what is going on here - the converter has Appox 300 to 500 rpm higher stall speed than a standard converter but wouldnt think that would cause this. Can someone please give me a clue as to whats with the extra RPMs. TIA::::::COBRO