Hey Teddyjames, looks like the number you have is from the head except the 5 in your number is actually an 8. That head was used on 58 to 62 235s.
If you look at the passenger side of the block,right at the distibuter you will find a similar string of numbers and yes from those numbers you will be able to get an idea of the year you have.
Also there is numbers on the distributer pad that will decifer the date built and plant of origin for your motor.
You can visit
www.inliners.org site for all the listings.
Hobert
