engine ID help

[chrisc1541]

the only numbers i can find on my engine are a remanufactured tag
that reads 407540 the tag is located on the front passenger side of the block infront of what i beleive is the temp sending unit or oil pressure sending unit
can anyone identify this engine
the intake has been replaced with a t/a performance stage 1 intake no other markings that are visible
any help appreciated
thanks
chris

1968 skylark custom conv.

[flynbuick]

Type?

Cid?

If Buick look behind the intake manifold next to the firewall. The cid is usually cast into the step just behind the intake.

[chrisc1541]

Type?

Cid?

If Buick look behind the intake manifold next to the firewall. The cid is usually cast into the step just behind the intake.

i'll look but that is what i'm looking to find out i was told its a 350 but want to know the year i don't think its original the alternator bracket is set up for a/c but the car does not and did not have it. fire wall is for a non a/c car small airbox etc.

[chrisc1541]

Type?

Cid?

If Buick look behind the intake manifold next to the firewall. The cid is usually cast into the step just behind the intake.

on the step behind the intake which did have a 350 marking
i found theses numbers
1241748

[DaWildcat]

That only narrows the block to between 1972-1981. Look for other casting numbers on heads & manifolds and compare here: http://www.buicks.net/shop/reference/smallblock_casting_numbers.html

BTW, to get the head casting numbers you'll have to pop a valve cover off.

Devon

[flynbuick]

http://www.buicks.net/shop/reference/smallblock_casting_numbers.html

72-81 series perhaps

[thepartsman]

on the step behind the intake which did have a 350 marking
i found theses numbers
1241748

1972 Block, 72 had an early and a late 350 Block

1241748 = Late Block

:TU:

David

[chrisc1541]

1972 Block, 72 had an early and a late 350 Block

1241748 = Late Block

:TU:

David

is there any possibility of it being a 73-81 block or is it definately a 72 block? if so how can i tell without pulling off the valve cover ?
it has a t/a performance intake and aftermarket headers.
water pump design or numbers any indication?

[DaWildcat]

Pull a valve cover or find the original engine stamps.

http://www.buicks.net/shop/reference/engine_ident_where.html

http://www.buicks.net/shop/reference/engine_ident_63_75.html

Since the engine's been modified already, you will have to do the homework to get the details.

Devon

[chrisc1541]

I finaly got around to pulling off the valve cover and found this number
on the head 1248452 f/30
but cannot find any info in the above pages any help appreciated

[DaWildcat]

1975-76 350.

http://www.buickfarm.com/home/MasterParts.asp

I simply did a google search for 124852 buick.

Devon

[chrisc1541]

thank you
chris