Small Block & Big Block Chevy Specific - question about heads...
camaroboricua
03-30-2008, 12:41 PM
I cant figure out what the casting # is on a set of heads I got. It looks like a big line of numbers with no definition on the at all. So, anyone have any secrets on trying to find out what heads they are? They are bolted on still so id like to keep them on if I can.
Also, they have press on studs. Could that be an indication of their size? I had a 305 that was like that so Im hoping thay also made some for 350's like that. :ripped:
BTW the # on the block is 3956618, but ive found the specs on that one already. thanks for any help.
9000th01ss
03-30-2008, 01:18 PM
That could be a 302 block worth some money.
Most non performance sbc heads come with pressed in studs.
If you wire brushed both numbers and still can't read them you can somewhat ID them by the shape on the front and rear between the valve cover and block.
camaroboricua
03-30-2008, 01:54 PM
the numbers are clean they are just very poorly cast on. Id be pissed if it was a 302, they guy told me it was a 350. I guess it doesnt matter, i have to get my car running either way. between the vc and the block theres a small arch looking design on it. Is that a good thing then?
ATCFLYBOY02
03-30-2008, 02:33 PM
a SBC 302 is worth more than your car right now!! Take them to GM and see what they say
!
!
9000th01ss
03-30-2008, 04:33 PM
The casting number for the block does show up as 302, 327, or 350. I'd find the suffix code and decode it. A good 302 block can go for a couple thousand dollars right now to the right person.
As for the heads you really need pics but typically a 302 or 327 originally came with double hump heads like these. There are several other shapes also but this is all I can find online. http://images.circletrack.com/techarticles/ctrp_0703_05_z+low_cost_claimer_engine_mods+chevy_ double_hump_head.jpg
camaroboricua
03-31-2008, 12:19 AM
kinda looks like that one but not quite, ill get pics tomorrow. Block says M 4 on it by the casting #. I know the M is for Mexico but the 4?
9000th01ss
03-31-2008, 09:32 AM
M is not for Mexico. It will be written out if it was made in Mexico.
camaroboricua
03-31-2008, 07:13 PM
M is not for Mexico. It will be written out if it was made in Mexico.
:confused: So what is it for?
9000th01ss
03-31-2008, 09:14 PM
:confused: So what is it for?
Who knows.
I've sold some rare shit to people and all they care about are the casting numbers, date codes, and suffix codes.
Maybe someone else can tell you what it means but your reaction to their answer is most likely going to just be "oh".