engine
#40408tzw #125 by the oil filter

trany
#gm3899621 on bell housing
#3857584gm pattent
#3925660
#p9b20b
#19L52602? missing last number or leter
26026

heads
I cant find any numbers on my heads. Where are they located at?

Thanks for any help.

engine
#40408tzw ...

... heads
I cant find any numbers on my heads. Where are they located at?

Thanks for any help.

There's a problem with that first "4" ;)
It could be an;
A = Mexico or maybe a 'K' = Canada or ???

The 'TZW' block suffix decodes as;
1978 1/2~3/4 ton C/K (two wheel or four wheel drive) 350 - 165hp RPO-LS9 for use in California Emissions or High Altitude models.
Assembled on April (04) 8th (08)

The casting numbers for the heads are under the valve covers in the spring area.
They are usually located between two of the rocker studs towards the upper side of this area.

Muncie decode link - http://www.camaros.org/drivetrain.shtml#TransmissionNumbers

sorry.
its #v0408tzw c8z175294 under the first set of numbers

Okay :thumbsup:

The "V" would indicate that it was assembled in the Flint Engine Assembly Plant.
The rest is above for date and application of the suffix ...

The 'Partial VIN' decodes as;
C = Chevrolet Conventional truck
8 = 1978 model year
Z = Fremont (California) Final Assembly Plant
175294 = sequencial VIN number assigned to unit

Soooo - the engine block was originally installed in a 1978 conventional pick-up truck built for the Chevrolet Truck Division in the Fremont Assembly Plant and to be sold in the state of California or maybe a 'High Altitude' impact area of one of the ajoining states ;)

Hope this helps;
John

John,
Thanks for your time and help.