martys76

is a double roller timing chain really necessary to a standard timing chain 350 small block not high horse power
just changing out cam to something a little better summit 1103 cam shaft

'75

A replacement chain and gear set from the local parts store is just fine, will probably run 100,000 miles easy. Or you can spend lots of money to get the most expensive one and it wont run a bit longer or better.

sunflower 1972

I know SINGLE roller timing chains are available if you want the added strength.