Why would these oem lifters need clearancing or special pushrods?

[Black1987Stang]

Im looking to order these lifters from Summit http://store.summitracing.com/default.asp?target=/egnsearch.asp&N=400070 . I was going to order from Jegs since they have the free 1-2 day shipping or whatever but i cant find the lifters on the site anywhere and plus im a Summit guy anyway. It says this Some are direct replacements for the OE lifters and are 50-state legal. Others are designed to be used when converting a "non-roller" block to a roller cam. Note that custom pushrods and minor clearancing work to the block may be necessary with these lifters amnit: Would only clearancing be needed if i was doing the roller conversion? If they are oem fit why would it need to be modified to fit?

 

[408stroker5.0]

If the block your using is a factory Roller Block which I imagine it is (You didn't mention if it is or not) then those Lifters will slip right in without any modifications/clearencing. It's just for Non Roller Block's that Clearencing and different length pushrod's is needed.

Shon

 

[Black1987Stang]

Ok cool I have a normal roller block, just replacing my old lifters i have in there now. They def. could have worded that better :Word:

 

[408stroker5.0]

Right On....You'll have no problem's at all then.