The MCP Front kit runs around $500-ish...APS&K, BMI,(& Others) or direct from MCP.
# MCP 4568 - Comes complete with Big 6" Discs Rotors, Calipers, Adjustable Hubs, Lines, Oil & weld on caliper mount.
Does not include the master cyl. I use the MCP750B or R(Red) Billet. $65.00 to $75.00 -ish
MCP300 Hand operated remote Front Bias Adjuster Control is a good addition. $50.00-ish
I have them on three racers. They work great.
I also tried the Brembo Floating front disc brakes, they work well to, but expensive.