Flat tappet ? Aggressive lobes ?

What type of cam and springs? Real aggressive? That'll make the decision a little easier on whether to do it or not. Key is to just follow the provided instructions to cover your a** and mitigate disaster. However, if you decide to not remove the inner springs check the lifters to make sure they're free and can move in the bores. If one lifter stops its lights out! Use good oil and additive, etc. Most importantly prime the engine before you fire it, and when it fires your going to want that thing hitting the RPMs 2200-2500 instantly for good oil circulation for 20-25 minutes. Then slowly back off the throttle when that time comes.

If it were me I'd just take the time to break it in right by removing the inner springs. Taking the inner spring out is cheap insurance against a failure no matter what as there is less psi on it to maybe prevent that lifter from rotating. Yeah its more work, but why risk it and you won't. have that sick feeling in your stomach or crossing your fingers before you hit the ignition button. Again, run good quality oil/additive.

Spring pressure is 300 seat & 750 open.

Roller tappet & aggressive cam lobes!
valve lift
Intake .760 exhaust .721, 266/282 duration