Cool car in great color combo...need to look close at body and potential rust issues, but certainly worth a peek.
The ad has a comment section discussing the 330hp rating, claiming it was like an L-34 motor, NO!
The LS-3 was the 402 version of the L-35 396. Low lift cam and nodular iron crankshaft. I'm sure the carb. and distributor timing were likely different as well.
Worked on a lot of Montes at the Chevron station in high school...those fan shrouds were the size of 30 gallon oil barrels