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beaterC10 · 08-15-2003, 09:09 AM

I posted the same question on the drivetrain board. Hoping someone has the answer.

Is there a quick a dirty way to identify a SB400 that is still in the truck without the gymnastics involved trying to read the casting numbers on the back of the block.

I was hoping the balancer might be the tipoff like it is on a 305. I thought some of the early 400's had 3 freeze plugs per side instead of the normal 2.

The engine is supposed to be a '75 vintage that runs but has a miss. The guy thinks it is bad valves, but I guess it could also be a sloppy timing chain, worn out cam, vacuum leak etc.

Any idea what a complete 400 is worth. Probably more than a 305 and less than a 454.

08-15-2003, 09:09 AM	#1
beaterC10 Senior Member Join Date: Jul 2003 Location: Indianapolis, IN Posts: 1,277	How do you indentify a 400SB I posted the same question on the drivetrain board. Hoping someone has the answer. Is there a quick a dirty way to identify a SB400 that is still in the truck without the gymnastics involved trying to read the casting numbers on the back of the block. I was hoping the balancer might be the tipoff like it is on a 305. I thought some of the early 400's had 3 freeze plugs per side instead of the normal 2. The engine is supposed to be a '75 vintage that runs but has a miss. The guy thinks it is bad valves, but I guess it could also be a sloppy timing chain, worn out cam, vacuum leak etc. Any idea what a complete 400 is worth. Probably more than a 305 and less than a 454.