Engine/Transmission (1998.5 - 2002) Should I plan on studs??

[NDaniels]

Well Dougs turbo prices got me thinking about a sps62. Installed with a set of m4 or 4. 5s and a new clutch. Thinking of buying the turbo now and installing everything in spring. Couple of ?s



1. Should I budget for studs?

2. What is the upper limit of efficient boost w/sps62? (I've checked other threads, #s seem kinda high)

3. Why is there a sale right before Christmas? :-laf



Thanks, Nick.