Well I have had a 96 GT for about 4 months now... and its time for a new motor. The third cylinder has about 30 psi of compression so Im guessing that it needs rings. Also when ever I have it at idle there is a horrible knocking... but when I push the clutch in it goes away( I think its crankwalk) So should I tear the NPI 4.6 down and go with heads cams new rotating assembly and just build this car or should I buy a 4v. Which would be cheaper ??