E-88 head and L-28 block (long)

Well I'm getting the HP bug here in the snow, the mind starts racing. I have a rebuilt L-28 short block (from my rusted out 77' 280Z) and a good E-88 head on my current 240.

I would like to put the E-88 on the L-28 and install a MS cam (grind #17033)

Lift int/ex .480

Duration In/Ex 274

I currently have 72SU's, Crane XR3000 ignition, and a headder on the engine.

My questions are:

1. will the head/block combo work?

2. What will the approximate compression ratio be with a stock head gasket/L-28 has dished pistons.

3. According to Motosprots they recommend a complete valve job on the head and replacing rockers, springs and lash pads. Is this truly necessary? I understand the importance of the rockers because they come in contact with the cam, but springs? I feel MS is a bit high on their cam kit and even their cams seem a bit pricy any sugguestions on other vendors for these parts?

Thanks to all whom respond,

nwa240z