im rebuilding my block this yr to run high compression and NOS... im going with prolly the 10.5:1 comp and eagle rods, blockgaurd and all new OEM gaskets... my main question is i heard the ITR oil pump is a good cheap upgrade and will fit... now can i use that and still use a LS water pump/timing belt set up? would the ITR/ GSR waterpump be an upgrade or fit?

if it matters.... my set up will be on the stock head for now... and im planning on runnin a 75-100 shot (ZEX) with all the fuel upgrades incase u need to know that