dinoindetroit

help with casting numbers and head id

--------------------------------------------------------------------------------

Hello, and thanks for all this great info I have found on this sight, there is alot of very informed people here and it has helped me alot,,, now I need somemore help,,,,,

I just bought a ls motor that looks like new, I know its a truck motor,,, but cant find any info on what it is,,, I only have about 500 bucks into it,,, but still want to know if I made the right choice buying it..

it's a 6.0 iron block, has a plug on it for a block warmer! rear of block casting numbers show 257518 on rear pass side of block.

heads have a 0821 number casted on pass side, below valve cover,,,

motor looks like new,, I have not pulled the covers or tore into it yet...

I think these heads are L98/LS-3 heads????

what the hell do I have, and is it a good one,,, it looks like brand new,,, oil on dipstick is clean like new!!!!

did I do ok on this???,, thinking bout putting it in my Nova after some mods.

nik1703

list of casting #'s:

933 97 aluminum perimeter bolt 5.7
806 97-98 aluminum perimeter bolt 5.7
853 99-00 aluminum center bolt 5.7
241 01-03 aluminum center bolt 5.7 (some late MY00 cars got 241 castings)
243 LS6 aluminum center bolt 5.7
862 and 706 99 and up 4.8-5.3 truck heads
873 99-00 LQ4 6.0 iron center bolt heads
317 01 and up LQ4 6.0 aluminum center bolt heads
035 02 and up LQ9 6.0 aluminum center bolt heads

01ssreda4

iTrader: (96)

^^those are only cathedral port head numbers. If his is an LS3 it would be Gen 4 square port stuff (which I do not know the numbers of).

dinoindetroit

thanks 01ss,still need help, cant figure out what the heck this thing is????