You know what I'm thinkin... That's a nice shiny lookin block, that would aid from less acrylic frills and add some more heat absorbing copper to the top... then Get rid of that usless smooth interior finish and add some randomly milled dimples to seriously increase turbulence! THEN it would and should perform much better... What's with these "prettied" up blocks! Just asking for a potential problem, albeit a small chance, but why take it and while sacrificing the extra cooling power of the copper top! Hehe nice though! 
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XP 1600+ AGOIA-Y (GreenLabel, UNLOCKED!@/ NF7-S 2.0/ PC 2700 DDR
10.5*172FSB(1806/ 1991 high), Vcore 1.792...@84.95Watts
--86' Chevette Heater Core
--1/2" Vinyl tubes
--Via1300-Stealth Mod(QUIET!) 
---Home made copper-tube block
---PVC small internal res
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