LM7 = iron block 5.3 LM4/L33 = aluminum block 5.3 am i right

[ma.racing]

ls6 heads shaved .005 and 560 lift voodo cam malory coils ls6 intake fuel rail 45 lbs injectors pvc vented ported 90mm tb tb bypass egr delete lt headers off rd y pipe flows with turn downs lunady ls1 roler set e fans flat tops for alil more compression 4l80e built by kings trans 3000 yank converter hd drive shaft and 3.73 true track strange axels and the stock housing shortin 3 in with 3 in wheel spacers with the 20s on a 4 link and a tune from rwtd dyno tunes from mobile i prob left some stuf out but its close enuf big thing is heads cam roler setup and pistons

[PurpleMinivan]

You are correct. Not sure on the years they put the L33 in and what models got them... Like he said, I know the trailblazers got them and I think the 5.3 Vmax's did also..

[blazedchevy]

ls6 heads shaved .005 and 560 lift voodo cam malory coils ls6 intake fuel rail 45 lbs injectors pvc vented ported 90mm tb tb bypass egr delete lt headers off rd y pipe flows with turn downs lunady ls1 roler set e fans flat tops for alil more compression 4l80e built by kings trans 3000 yank converter hd drive shaft and 3.73 true track strange axels and the stock housing shortin 3 in with 3 in wheel spacers with the 20s on a 4 link and a tune from rwtd dyno tunes from mobile i prob left some stuf out but its close enuf big thing is heads cam roler setup and pistons

you say cam roler solid or is that hyd.also standered bore,dont know what this is (headers off rd) i need a set of e fans,what was your compression,and your pvc was vented,i have mine hooked to a pan evac on my exhuast i hope im brothering you with my ? just wondering why would you reather go with that l33 instead of a ls1