72 340 warranty block

I have a standard bore 340 standard 9.56 deck height out of a 1971 Demon. It is a 340-1 block one of the most sought after do to its strength for stroker install. most are 340-5 to 340 -8. Plagued with porosity and cyl not being concentric.

It is not the year. It is the -1 after the casted 340 left side behind the starter. 340-1 . I have had many 340's machined you can see the quality difference in the block due to no mold imperfections on the -1's. Especially in the right rear lifter bore and rear of block. -1's are first pour and quality scrutinized. Will sell if interested.

Some info you should take into consideration when purchacing a block if date code is preference. the lower the number after the 340 the better chances you have of getting a solid foundation. also demand to know the deck height many are cut to far over the years