when going from a stock flat tappet cam to comp cams Extreme Energy 270 do the pushrods need to be changed? Not for durability reasons but for cam base differences.

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1986 CAMARO Z28 -> 151,000 original miles, 43,000 on 89' vette 350 block, Holley 650 DP, Weiand intake, 1.6 rockers, 1 5/8" headers, no cat, 2 1/2" Flowmaster catback, Mallory coil, March pulleys, T5 with 3.35 1st gear, 90% Centerforce clutch, 3.73 posi, Eibach 1" drop springs, Spohn LCA's, Spohn adjustable panhard rod, Subframes connectors, polyurethane swaybar bushings/endlinks, 2 12" Sound Streams, 2 Infinity 6X9's, 2 Pioneer 6X9's, 800 watt Lanzar Vibe amp. ET 13.22@ 106.4MPH Next mods-> Homemade ram air, B&M shifter, Extreme Energy 230/236 cam, Holley Street Dom intake.

 

i don't think so. read my post about clearance between the rocker and retainer. it'll tell you a few things you might want to know.

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ICON Motorsports
1st & 3rd

 

Get a pushrod length checker if you have ANY doubts. Lunati makes one that has alot of adjustablity for roller, hydraulic, solid and other issues you may have. I am glad I checked the length for my repower, it only cost me about 65$. Why not buy a set of pushrods that are perfect for YOUR motor. Most manufactures make pushrods in non-standard lengths that will be just right for your application.

 

if going from a flat tappet cam to a flat tappet cam the pushrod length is the same. if you were switching from flat tappet to roller or vice versa then pushrod lenght changes