Help! TA adjustable pushrods too long (?)

[jamyers]

I'm stuck/stumped. Got some of TA's adjustable pushrods from another board member awhile back, and:

I've shortened them as much as possible, but on every one the hydraulic lifter plunger is very nearly bottomed out - to the point that if I adjust/lengthen the pushrods by 1/2 turn, the valve starts opening (using a dial indicator). Surely that can't be good...

* Pushrod min length is 9 7/16" (using a tape measure, my mic don't go that big)
* Block was milled .040, the pistons average .004 below deck.
* Heads were shaved .017 (that I know, I don't know their history) to clean them up. (Piston-to-valve clearance is .3" or better (TA212 cam and Wiseco dished pistons), checking this is when I noticed the issue. Surely with clearance like that the heads haven't been milled down a huge amount...)
* Stock steel rockers.
* Felpro .040 head gasket
* New hydraulic lifters from PAE
* Valve stem heights are all equal, looks to me like right at 2.08" or 2.1" from head to top of stems.

Isn't the stock pushrod length shorter than the min on these adjustables, and if so, what gives - shouldn't the TA pushrods be able to adjust way shorter than stock?

I'm really open to suggestions - have I missed something? Does TA make different ranges of adjustable pushrods? I heard ch*vy lifters are shorter, how about them?

(Asking this over on V8 as well...)

[71stage1conv]

The heads were probably previously shaved, other than that I don't know what else to tell you... But it does remind me the main reason I went with rollor rockers.

[10sec 455]

You have 350 pushrods....

[BillMah52]

Stock 455 length 9.35
Stock 350 - 9.65

[jamyers]

Sheesh. You'd think that with them within .3 of each other, Buick would have changed something to make them the same (like maybe a cam with a larger base circle? )