The trap of the industrial / motorhome 318-3

yup, I got one of them 318-3 premium engines in my 66 Barracuda, runs great bone stock 2 bbl,
a couple more things that are different about them are
1: the pistons are 1.658 compression height, instead of 1.741
2: the heads are only 57cc
3: they came stock with a double roller timing chain