max lift

[dirtydog]

what the most lift stock vortec springs can handle 

[hot rod heep]

dont hold me to it i think its like 480  or close to that

[MR NASTY]

I would guess in that ballpark also

[randycrane79]

thought it was 440-460

[Jjay78]

thought it was 440-460

i thought it was 465 or so......

[91 k1500]

stock vortec springs suck and are about maxed out with the stock cam. comp cams makes a replacement spring, seal, retainer kit that will allow upto 500 lift without machining the heads... I ran this kit on my vortec headed sbc for 3 yrs without issue... cam was 500 lift.. ran damn good with foraged flat tops performer rpm intake and holley 650......