Reply to "1970 351c 4v"

If the engine is 100% factory original, no aftermarket stuff. If it has never been bored. And if all 8 cylinders have good "guaranteed" cranking compression, then the engine is worth "low four figure" bucks to a collector. If the seller can't report or guarantee the cranking compression the price drops appreciably.

Otherwise a 1970 engine is only worth the price of a set of 1970 4V heads. A two bolt block, the standard crank, etc. are dime a dozen.

There is an exception in regards to the block. A 1970 block (all 1970 blocks were two bolt) with an early suffix, that has never been bored, casting number D0AE-J (I think J is the earliest suffix). The old guy wearing a cowboy hat told me the earliest 1970 blocks are reported to have slightly thicker cylinder walls. They were engineered for higher compression and super premium gas. The block's casting date will be around August 1969, i.e. 9(H-J-K)XX.

9 is the year code, in this case 1969
H-J-K are the month codes for August September and October
XX is the day of the month, it could be 1 through 31.

The earliest blocks having thicker cylinder walls is not common knowledge. There's a chance a seller won't know what he has. If you find one with 4.000 bores AND it includes the D0AE 4V closed chamber heads it was originally equipped with, the package is worth about $2K. If you find such an engine, buy it!