Can I just replace existing header bolts with locking header bolts?

[mbl585]

I was going to replace my header bolts on my car with locking ones from stage 8. I also wanted to do this without taking the header off, cleaning surface and putting on new gasket. Can I just replace each header bolt, one by one, on the car? I wont' get a header leak from doing that right since it is only one bolt at a time? What does everyone think?

 

[86GT-Top]

should be fine that way...i at least think

 

[5spd GT]

Yeah it would be fine but its better if you do it the old fashioned way

David