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59weasel · 01-11-2015, 02:57 AM

in the truck is a 2004 LM7 out of a silverado 1500.
i have stock heads but have a chance to swap out 2008 chevy van casting #799 heads which i have read on other forums is the same heads as LS1's except the valves of coarse. but same CC's.

my question is they are both 5.3L engines/heads. so they should be a straight swap correct?

minus new gaskets and head bolts....

any body got some helpful knowledge i can tap into?

01-11-2015, 02:57 AM	#1
59weasel Registered User Join Date: Feb 2011 Location: Redmond OR. Posts: 65	ls/lm head question. in the truck is a 2004 LM7 out of a silverado 1500. i have stock heads but have a chance to swap out 2008 chevy van casting #799 heads which i have read on other forums is the same heads as LS1's except the valves of coarse. but same CC's. my question is they are both 5.3L engines/heads. so they should be a straight swap correct? minus new gaskets and head bolts.... any body got some helpful knowledge i can tap into? __________________ '59 SWB (the money pit) Camaro clip/5.3 LM7/700r4/10bolt rear/bagged/and some mild mods here and there. '93 Jeep Cherokee with some stuff. (the toy) '06 Silverado 2500HD (daily driver) '12 Equinox (wifes ride) '66 Chevy LWB (daughters ride)