numbers on the back of 454

[84CUCV]

after i got the sm465 off i found h and a 445 under it. other side was 2 high perf.

just above the where the 465 bolts to was these numbers. 14015445. on the left side.

anyone know what they mean? thanks

 

[nvrenuf]

14015445 is the casting number, some are 4 bolt main but not all. Good luck.

 

[84CUCV]

thanks

 

[toomany]

14015445 = 78-90, 454, 2 or 4 bolt

"High Perf" means nothing...all big blocks have this.

 

[nvrenuf]

"High Perf" means nothing...all big blocks have this.

You're right it means nothing but it's on passenger blocks only, tall decks say "TRUCK".

 

[84CUCV]

this was from a 85 cew cab. didnt see anything that said truck

 

[toomany]

this was from a 85 cew cab. didnt see anything that said truck

It wouldn't say "Truck" just because it came out of a truck. "Truck" blocks were in heavy duty appliacations, dump trucks, busses, etc.

Blocks that say "Truck" have a higher deck height.

Tall deck=10.2"
Short deck= 9.8"

Tall deck motors were 366, 427 or 454 cubic inches. The extra deck heighth was for a differnt style piston. I believe it had an extra ring or thicker head.

 

[84CUCV]

got it thanks

 

[80' 427]

I really don't think its a 4 bolt. I have one out of a c30 and its a 2 bolt. My camaro 4 bolt is from a power unit.

 

[nvrenuf]

Interesting, I've got a 5445 block from a Suburban and it's a 4 bolt. Luck of the draw I guess.

 

[80' 427]

Could be the year too. Mine were all 78-79 except my camaro which is a 88 block.