I was wondering, I am building a performance 305, as much of an oxymoron as that may sound to some of you. And I wondered since different years were rated at different HP and TQ, since I am putting all new parts in it, including pistons, crank, etc. if I should get one of the higher HP blocks or if it would make a difference. I also wanted to know if any years were more stout or durable than others. May be a dumb question, but try and help me LOL

 

blocks are all the same as far as 305s go, other than the one and two piece crank seals and roller cams.

 

Do roller blocks make any more power than solid?

 

Roller block refers to the camshaft setup. The block will be the same cast iron whether its a roller cam or flat tappet, solid or hydraulic.

 

Stekman
Roller block refers to the camshaft setup. The block will be the same cast iron whether its a roller cam or flat tappet, solid or hydraulic.


Roller and Non Roller blocks are not the same. Roller blocks are machined differently to accept a roller cam. You can make a non roller block work with a roller, but it takes some machining. Also roller blocks are one piece rear main.

 

I did not say they were machined the same, i said they were the same cast iron material. The fact that the block may or may not be machined for a roller cam setup has very little influence on the amount of power that that engine can produce.