What else should I do?

[Newbie]

I'm just about to put the short block together, from my 74'Westy.
It's a stock balanced 2.0 polished block and dished pistons with a #86 Webcam and a 30mm shadek pump. I have tall dual intakes and 36 DRLA Dell's.
The local Machine shop said they may have 914 heads for me with 42x36 valves.
Is this going to be too much for my engine?
Is there anything i'm forgetting before I bolt it together?

Mahalo's
Sean