I have a 602 crate in the late model…rather lame GM crate motor… steal headed smaller port flat tops…boring!
through the three speed…its 330 on the dyno…suppose to be 350 out of the box…
figure a 15% losse due to the tranny being auto…
An LS1 is a 6.0 with aluminum heads right? 370/ 350 isn’t out of the relm
Darryl