occhevelle

I have a pullout LS1 from a 04 GTO (so I was told). I checked the heads and either I'm having a moment or the casting numbers are ground off. Is this normal or am I looking in the wrong place? Can I id them from the longer number below?

poltergeist 02

iTrader: (65)

Do you have pics of the exhaust ports?

occhevelle

I would have to pull my headers off. Engine is in the car

poltergeist 02

iTrader: (65)

Do you remember if they had D shaped ports?

JRENIGAR

iTrader: (37)

Casting # should also be in the rocker valley.

occhevelle

I found a pic from when I was installing the engine and the exhaust ports are round

poltergeist 02

iTrader: (65)

I'm going to guess they are 241's then. I'm not sure why they would go through the trouble to do that if they are 241's though.

occhevelle

That's what I thought. I can't think of a good reason to shave the numbers off other than to hide switching in heads that were worse than 241s

occhevelle

Or maybe an indication somebody did some work to the stockers but it sounds like there's no easy way to figure that out. I'll think that way to make myself happy. Thanks for the replies.

poltergeist 02

iTrader: (65)

For the sake of finding a good deal, I hope your right!