Started with a 71 350ci Rocket Block, took the bore to 4.125", steel 330 olds crank offset cut and stroked to 3.45" Using eagle sbc sm journal 6" rods, Icon sbc 400 dome pistons. WORKED #8 olds heads (Using them do to class restrictions) Mondello RPM intake.
I was originally going to use some big block J heads, but with the way the blocks been decked, I'd have to take the manifold down ALOT, and the NHRA wont like that too much,so I just had my 8 heads opened up. Also if anyone has ever noticed while building an olds, the rocker arm geometry BLOWS. I went with screw in studs for a big block. (I messured the ones that came off of the edelbrock heads and bought the arp set). So I did some research and took measurements. I came across a set of 1.72 ratio ANGUS rocker arms that will work better than the high end harland sharps. The only thing I had to do was measure some pushrods to get it dead on, but other than that, the geometry is dead on, the fulcrum is dead on, the shoulder for the stud is dead on. If anyone is going to put some screw in studs I would highly recomend doing this. The only other thing you have to do is make sure your spring can handle the valve lift while going with a bigger ratio, but thats not to much of a problem for olds as I've come to see that some decent race cams dont have much lift at all, but some mean duration.
I guess this post kinda got side tracked by my fetish for these ford rockers arms lol. Any input/questions?
I was originally going to use some big block J heads, but with the way the blocks been decked, I'd have to take the manifold down ALOT, and the NHRA wont like that too much,so I just had my 8 heads opened up. Also if anyone has ever noticed while building an olds, the rocker arm geometry BLOWS. I went with screw in studs for a big block. (I messured the ones that came off of the edelbrock heads and bought the arp set). So I did some research and took measurements. I came across a set of 1.72 ratio ANGUS rocker arms that will work better than the high end harland sharps. The only thing I had to do was measure some pushrods to get it dead on, but other than that, the geometry is dead on, the fulcrum is dead on, the shoulder for the stud is dead on. If anyone is going to put some screw in studs I would highly recomend doing this. The only other thing you have to do is make sure your spring can handle the valve lift while going with a bigger ratio, but thats not to much of a problem for olds as I've come to see that some decent race cams dont have much lift at all, but some mean duration.
I guess this post kinda got side tracked by my fetish for these ford rockers arms lol. Any input/questions?
