springs for colt GCNM

I bought 1974 year Colt GCNM and was going to change out springs , recoil , mainspring , firing and use springs that I had on hand , but there seams to be a lot of difference  in length,
Recoil spring is 5 to 6 coils short
mainspring is 4 coils short
and firing pin spring is short and weak 
all thin compared to my 1976 colt government modle

don't see any at Brownells , what should I use ? 
 , ,

Wolfs correct weight springs.

Brownells sells Wolff springs. Their recoil springs come with a firing pin spring. I use the standard springs, not the variable ones. Variable springs didn't work as well with wadcutter ammo in my guns.

what would be correct weight spring for GCNM with clark scope base and a ultra dot 1 inch

I am guessing it would be almost same as my government model that I have built 
with 1 inch ultra dot , 10# recoil , 19# mainspring, and the firing spring that came with the wolf spring.

guess I was thinking GCNM might be different because I never had a gold cup apart before.

Depends on your loads. I have 10# recoil and 18# main in my Springfield with slide mount 1" ultra dot.