Desided to change spark plugs now have surging

It happens at idle.
I set the gap at .044 just like the tech manual says.
For some reason for 91 and up it says .054 I guess they have a different cam I know 93s have different pistons.

Mine is 89 an following the directions it said gap a .044

Well it might be that it wants a hotter plug I don't know my car is very touchy and it doesn't take much to make her act up if she doesn't like something. So I put the Bosch plat 2s back in. Runs like a champ now most people hate platnum in 5.0s but mine seems to like plat 2s so that's what she'll get.

I am running a slight timing advance but still burning reg oct 87. Oh and I beat down a 97 Z28 today he had 22's on it lol all show no go.

I don't know I used a Chilton's Manual it might have had a typo. Either way problem solved Thanks I will diffently look that up for future reference at Ford or somewhere because I don't have the original owner's manual or hood.