COMP Cams® Valve Spring Kit for Ford GT40/GT40P Engines

The COMP Cams® GT40 Drop-in Valve Spring Kit allows up to .570" lift and provides spring rates that can handle significantly more aggressive lobe profiles to maximize the potential of GT40 and GT40P cylinder heads when using a flat tappet camshaft.
Features & Benefits:
• .570” Valve lift capability
• Kit includes Valve springs, 8 standard and 8 +.050 locks, Viton seals, and retainers
• Valve spring upgrade provides increased stability and RPM through increased dynamic control

[@The1978fairmont]

So a roller cam will not work with this kit? Was going to use xe274hr-12. Will these still work?

[@adamrushka8096]

Sounds like it. Not sure why they would do flat tappet over roller though

[@lossanchez8428]

It should work