Just read this. My 400 just went south and it's time to upgrade. Have access to a 455 and a 400 to build, leaning towards camming up a 71 455 with my #13 heads.
Why are the 1970 400 and 455 so closely rated for hp, with the 400 usually being faster in magazine road tests of the day?
__________________
 70 GTO Restomod -- 400/200-4r, nothing to see here
70 Firebird -- 455/400
69 Mach 1 -- 390-C6
07 Escalade EXT
|