Probably the first builder to come on here in years to explain a situation, admit their faults, offer insight, and do it in a respectable fashion.
My position, not that it matters. It went to IPS to be looked over with a fine tooth comb and their opinion on what they like is different then cams opinion.
Fact: Cam has really pushed the benchmark with the level of performance in the last few years. Cam is a step ahead of IPS at all times.
So for IPS to say "the head was to tight you need a new one" is a bit weird as it wasn't his motor but ok. It didn't detonate and ran well...... But he was glad to sell a new head and re machine it. Why couldn't the Redline head be turned up a few more thou if some one wanted more clearance? This was allegedly a case of not enough material being removed not to much, so why not just machine the old one.
On the trans, there are several threads where guys debate on the Shift Pro detent arm. Lots of guys like the kit as is, others like it with a firm OEM spring. In my opinion, it really depends on how the star is worked over but in the end it's 50/50. If your 6'3" and 245 lbs you will definitely want the firmer spring. If you're a wee 5'7" 160, you will probably prefer the lighter spring if the star isn't to worked.
Let's also remember that this same combo was down a handful of both torque and HP after IPS "fixed" everything.