$90 doesnt include the headgasket does it? .

so you weld the block rather than plug it? interesting..........seems like a lot of unnesecary work, have you had a block "leak" before or something? or a head?

The GE kit allowes you to run the external line off the block to the back of the head before the solenoid. The ls blocks dont have an orifice so theres no plugging needed. the head has the 1/8in orifice that the GE kit comes with a plug for. welding that orifice on the head kinda trashes the head for further use, if the customer decides to switch to a vtec block later on, unless you get it retapped.