Highway RPM\'s I am running down to Mexico in my 383 stroker, Edelbrock Performer, Rochester 4bb, Crower Cam grind for low rpm tq. I went with 8:1 compression ratio to use Mexican gas. This runs though a SM465, NP205 and 4.56 diffs. I am spinning 33 inch rubber. So, while my setup for low rpm tq is great for the beach sand, freeway speeds get way out of my tq band and rpms are high to say the least. If I go with 35 inch tires, how would that help my high speed rpm, and at what cost to my low speed performance. Also, I am currently timed at 10-12 BTDC. When I am running US gasoline, what timing should I shoot for in order to get best performance?