I remmber reading something in a magazine about the 69/70 R302 blocks being a superior cast to any of the later production 302 blocks and not cracking at more extreme power levels like the newer production blocks (500whp+). I have also heard that the R302 block is essentially a reproduced 69/70 block , is this true ? I have also heard that the earliest windsor 351 blocks where a much better cast then the newer windsor 351 blocks , just wondering what the facts are. (Still brushing up on my windsor block knowledge)

 

Don't stop at 70.....I've heard the same runs through to 72-73 ish......

 

so the R302 castings are reproductions of the earlier 302 castings ?

 

sounds like all bullshit to me.

 

I would say no..R blocks are thicker blocks with better nickel content. Ask Scott's guy Fulco, i'm sure he knows the deal.

 

the 1969-1970 351w block has a higher "nickel" content but no matter what if you don't beef up the block you can destroy it.

 

if Scott posts his pics of the difference between his R block and a stock block you will see how much more substantial the R block is

 

bullshit.

 

I was referring to early windsor blocks (302's and 351 windsors to be more specific) and not the late style 302. I know for a fact that the earlier blocks are stronger. But i don't know how much better they really are , a few people on other boards where arguing that the R302 block is just a reproduction of the earlier blocks , that where cast/built when america took pride in making their automobiles(or when they where actually making their automobiles).

 

They are WRONG...R blocks are not repopped early blocks. They are "NASCAR" style blocks..much thicker than early blocks.