valve springs

[85ha]

I hear lot of guys running the comp cams 980 springs. I have a set of 981 springs I was thinking of installing. Has anyone used these springs and will they work with stock cam

 

[RegalT-type85]

Those are the ones rated at 105lbs right? Might run a bit rough/harsh on valvetrain, you could upgrade your cam might pan things out a bit.

Or

Just get LT1 100lb springs/980s/ Kirbans 100lb drop in Springs.

 

[85ha]

yes they are 105lb spring. Was going to use them if they will work. Looking at specs of 980 and 981 springs they are only a few thousandths diff dia and height but bout 10lbs more spring press.

 

[RegalT-type85]

I'm sure they could fit. It really comes down to, if they will work with your stock cam.
From what i know you might need a different Cam with that higher lb spring.

I plan on going with kirbans 100lb springs myself, drop ins.
other members should chime in with if they will fit/work tho.
I say, use your motor for testing only if you can afford to replace/repair it.