JimMueller

iTrader: (9)

How thick of a pushrod can I use with these components without massaging the block or head? 3/8? 7/16? Can it be straight or does it need to be tapered in a specific manner? Head will be milled about .030 if that matters.

WKMCD

iTrader: (2)

I've run Manton 11/32's without opening anything up. I'm running 3/8's now in worked heads.

offaxis

iTrader: (19)

Ive heard the 3/8 fit with stock heads. I tried them with my morel lifters and they did not fit . I am not sure if the stock lifters would have made a difference. Hope that helps

LS1 BU

iTrader: (13)

There is more clearance for bigger pushrods on l92/ls3 heads than other ls gm heads. I only had to open the holes up slightly to fit 3/8 pushrods.

JimMueller

iTrader: (9)

I've used 3/8's in the last two motor builds (both using 5.3l heads) and there's some very minor 'polishing' on certain sections of certain pushrods upon removal. Not sure if that's acceptable? I don't recall if I had that on the OEM / Comp Cam 5/16 pushrods in the past.