who sells the 4000 gsk other than piers and TST? Piers seems to expensive and TST is out.. I know TST price doesnt include valve springs but even with springs it is still under 200$ piers is 225$

 

EEP sells a shim kit don't know how much but check enterprise engine perfromance.
DM01

 

Piers kit includes 12 valve springs and good side install instructions with their kit. TST kit includes no springs and thru the top instructions-(tricky and easy to foul-up).Their valve springs are sold in a set of six (2 req.) at around 70 bucks I think. so really the Piers kit is a lot cheaper than TST overall. Dont know of any cheaper options. Just my 2 cents worth

 

Piers has the best price. It may seem like a lot of money for what you get but the results are well worth the money.