Technical Hemi pushrods

I'm building a 354 Hemi, the cam grinder suggested using the Sealed Power HT812 lifter, when I read about using them I find that it is slightly taller than the stock hemi lifter. How do you deal with the pushrod lenght? I wanted to run stock rockers and non-adjustable pushrods.
Its a mild hydraulic, .440 lift cam.
I believe the radius inside the lifter is different from stock hemi as well, can I shorten a stock pushrod and turn a different radius on it?
I heard that using this lifter was common stuff for early hemis but can't find any real info on it, anybody on here using them?

 

Adjustable push rods is the only way to go. I'm out of the shop but will get you a part number and Co. name latter today.
The Wizzard

 

comp cams makes a push rod checking tool .them or manely make push rods in different lengths

 

Call smith bros - push rods is all they do - get their checker and then order exactly what you need

 

Or try Manton http://pushrods.com/. Smith Bros. or Manton, either one.

 

In a bud's 354 Hemi, I used '52 Studebaker lifters (mechanical) they were 'hollow', and seated the push rod at the bottom of the lifter, maybe 3/8" from the lifter face. Lifter 'body' was about 2" in overall height...this was way back in the early '60s. Rod & Rail speed shop had some adjustable push rods (Crane? Can't recall, maybe Clay Smith) that were the best I've ever used, just excellent.
These were 5/16" outside diameter with fine metric threads, and tall adjusting nuts...(7 mm.)
Push rods were long and unassembled, you determined length, cut the tubes, and pressed in the ball ends.
Seem to recall Stude solids used in Cadillac engines with solid lifter cams, anybody confirm that?

 

the 812s aren't exactly the same as the OEM lifters, but they work w/o any other changes. Used them in mine. One company's, comp cams best I recall, 812s are for SB Chevy.