There are two appraoches to front end upgrade in the Fatman book..one IS the frame cut with their own sub frame allowing the use of any stage of their Mustang II suspesnsion..this kit is very very nice and has road manners and rideability that can be set up any way the owner desires and to any level of show or utility.
The second approach by Fatman utilizes the stock front suspension with slight mods, lowering spindles, relocated shocks, disc brakes and R&P steering, you choice of power assist or standard steering.
Both kits are well engineeered and offer the customer the chance to upgrade and targets the low dollar approach as Chrylser engineer suspension was excellent design or allow you to go extreme with chrome suspension pieces, coil overs, bags whatever trips your trigger.
The cutting of coils is a destructive course that alters the geometry of the steering, causes problems and you must buy new coils should you screw up or just flat not like it. Slamming a car to the ground by cutting the coils gives the driver the look he wants but driveability suffers greatly.
Safety issues such as they are..your braking and suspension are true concerns no matter stock or modified.