Block ID question

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Rocketperformancetrans

Rocketperformancetrans

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Location
sparrow bush, ny
restoring my son's 75 duster 360 car
getting ready to pull the motor, able to see VIN number, its not the original block
casting number is 4006830-360-3
cant see the casting date on pass side header is stil in car
I cleaned the pad on drivers side all visible is an R7
stamp
thoughts?

20220621_200947.jpg
 
Was there a different VIN stamped on the block? If it was blank with no VIN, it may be a replacement engine if the original got blown up. That is the first scenario that came to my mind since the car is a 75 and the motor is a 76.
 
JDMopar said:
Was there a different VIN stamped on the block? If it was blank with no VIN, it may be a replacement engine if the original got blown up. That is the first scenario that came to my mind since the car is a 75 and the motor is a 76.
Click to expand...
yes there is a different vin.
big blocks usually have more stamped on theid pad
 
Rocketperformancetrans said:
I read that thread even replied
stillcan not figure out what the R7 stamp is
its the only stamping on the pad
Click to expand...


You may have a warranty or replacement engine...

Especially if there is no stamped numbers on the front of the block below the head face...
 
krazykuda said:
You may have a warranty or replacement engine...

Especially if there is no stamped numbers on the front of the block below the head face...
Click to expand...
I thought so too but there is a different vin stamped on the rail next to the pan

thinking the R stands for regular gas
7 =1977
cant really see the full casting clock on pass side
thanks for the reply
 
Probably a rebuild from one of the many engine shops around the nation. The vin number is on the passenger side along the oil pan rail. Kim
 
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