First off, I am keeping the 225 for a future roadster project, and do plan on going efi turbo with it controlled by megasquirt. Yes, I have springs and chisolm lower arms for now, but fully intend to swap in crown vic front suspension, and independant rear suspension in the future. My 83 swb had a big block with the slant 6 springs with no issues. The truck sat about 1 in lower than with the six.