I think John, the extra 300LB shouldnt be a hindrance given the additional BHP. The 450SLC 5.0 weights in at 4420LB. Perhaps a consideration to the front end that takes most of the additional 300LB could be a spring replacement with the blue mark springs (long) if you have the red mark (short) springs and thicker spring pad to keep the nose off the ground. Presumably a good spring setup would be spring number 1143210704 with a reduced spring travel per 1000 N load of 16.4 and wire diameter 16.3. There are 7 variances of front springs for this model. An awesome achievement.
