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Originally Posted by tomtom72
Q1: It looks like there is enough room to just move the A/C comp. enough to get at the breather cover bolts without discharging the A/C gas?
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There is enough slack/flex in the system that you can remove the AC compressor to get it off of the breather box and sitting down by the water pump with no issues.
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Q2: To do breather gasket leak the inj. housings should be R & R'ed because all that is in the way?
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No, the breather box should come out with out removing the injector housings (it does make it easier though). You will have to remove the secondary butterfly linkageand the actuators to get the breather box out.
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Q3: P/S pump doesn't have to come out to move A/C comp.?
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No, PS pump can stay put unless you are removing the driver side cam cover.
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Q4: Helm doesn't say T/B & Air horn extension & plenum & Inj. H. bolts need loctite, I missed it in reading the book?
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No loctite in any of the serviceable top end stuff.
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Q5: Parts CD says there are different style connectors on CTS for 90 Z, I read this worng?
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There are two different CTS sensors on the driver side injector housing. One is for the ECm reading, the other is for the gauge. To my knowledge these are the same for all years. One is a standard clip, the other is a spade connector.
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Q6: To change injectors the fuel rails should be separated from the distribution block by disconnecting the lines at the rails? And those O-rings are the same as for the fuel filter?
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Don't remember off the top of my head what the size for the fuel rail block is. I know you can either get them from GM or Kurt White.
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As a P.S. to all this I just noticed someone else's post about injectors. I purchased RC #205 and it seems I got the wrong ones? It seems I should have bought #225? Any help on this would be great! Thanks again. 
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The 205's will be fine. 225's are recomended for larger motors or Nitrous applications.