I'm getting ready to purchase a set of 240's for my 400 to 512 build and I have a few questions. I think the 61617802-C00 is the correct head for my application but I would like a second opinion. Cam will be a hyd roller about 240 degrees. The cam in my 496 is I 242 and E 248 with ported eddy heads and carb. Its a monster and I love it but I want to use sniper FI with the Holley ignition and my engine builder believes a little smaller cam would work better. He would also like to see 130-140 spring at the seat and 310 and 340 open and likes the 10 degree retainer. I don't have any information on what springs are factory installed but from what information I have the 7802 head should be the correct choice. Is it? This is a street car. Looking for 600-650 torque under 5500RPM. Your thoughts.