AngryCorvair (Forum Supporter)
AngryCorvair (Forum Supporter) MegaDork
5/31/25 6:15 p.m.

PM sent via "Contact" button on your profile page, which goes to the email address you used to sign up to the forum. It will be from "robot@*****.grassrootsmotorsports.com"

 I'm local and want an L33 for future MonZora shenanigans.

grpb
grpb Reader
6/1/25 7:03 p.m.

Oops deleted the first post details below, AngryCorvair gets first dibs if still interested.

5.3 LM4 aluminum block Gen III LS (24x) 862 heads.  I did not pull myself nor run but it looks to be in good shape, one or two broken exh manifold studs need removed, I have not dug into this at all.  Selling because plans have changed.  The wiring and ECU are somewhere around but I think the label fell of the box so no pics at the moment.  Includes speedway motors engine stands as shown in pics.

$1000 firm - Indianapolis area, can help load with cherry picker. 

bmepsi at gee male

RacetruckRon
RacetruckRon SuperDork
6/1/25 9:05 p.m.

862 heads and aluminum block screams LM4 to me not L33. Bore scope would confirm the dished pistons (LM4) or flat tops (L33). Block casting numbers would help clear that up too. Because $1200 is really pushing it for an L33 of questionable origin and way too much for a LM4. 
 

edit: just saw the Trailblazer oil pan 100% this is an LM4. 

grpb
grpb Reader
6/10/25 10:16 a.m.

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