Has any one ever heard of World Products installing .100 over valves in sportman2 heads,

I know the valve/guide clearance is too big on them factory..........oil usage and smoking.

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383 Speed-O-Motive stroker kit with Holley 750DP, RPM intake,MSD6a box,World Products Sportsman II heads, ported and polished with 2.02/1.60 valves,64cc,TRW forged pistons with 10.7:1 compression, Comp Xtreme 284 cam,Crane pushrods, Comp Cam 1.6 full roller rockers,ATI damper, 40 series Flowmasters, 4.11 gears with TH350 and Hughes 3000 stall.

Tracy I have heard the same thing about the valve guides being a little loose, so far I have not had a problem with it smoking or using any oil. I took them down to the local machine shop to have a valve job done and to machine the spring seat to except a 1.437 inch spring, And they tried to tell me that the valves were 100 thousands longer and it would not run right!! It sounded kind of funny to me since it runs 12.80@109. sounds like they were trying to sell me some thing I did not need

Are they Sportsmans? they normally come with standard valvetrain components. But I suppose you can order whatever you want.

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409SB, TH350, 10bolt 3.70
11.70 @ 117
Just gettin started!!

I will assume that we are talking overall valve length. Yes they can be longer and will run for a while. You have to check the valve train for travel of the rocker on the valve stem, then get the proper pushrod length.