Does anyone have a good set of these? I believe the 67's had this ratio, and I think they're aluminum. looking for more cheap power :laugh:
Can the rockers be put on my existing shafts? If not, I'll need the shafts, too. How easy is it to change the rockers on the shafts? Are they held on with clips? I've never really looked..
If they are 70-76 shafts,no you can't use them.The rockers are kept separated by springs.I'll get you a pic today. gary
What is the problem with using these rockers on a later shaft, cause that's the way I did it, inquiring minds want to know. ou: I took mine back off because of the pushrod to rocker missmatch. Also didn't the SBB of the same years have the same rockers, they have the same part numbers?? Dave Berry
Dave Here are pics of the early,67-69,rockers vs the 70 and later rockers.I don't know how you used the early rockers on the 70 shafts.You need the springs to separate the rockers,and the end caps to retain them.Maybe you have a way,if so I'd like to learn,as it saves a lot of work.And yes,the 350-455 are the same rocker. gary
Yep,although the cup in the rocker is a different radius than the 70's,some use a hybred pushrod,from TA,with a early ball on the pushrod end,and the 70 style pushrod.I've run them without the hybred end and found no real issues.Maybe if you drive 10,000 miles per year there would be wear,but I don't drive the cars that much. gary
Adam.. no.. you won't see it on a timeslip, nor feel it 'seat of the pants'. In fact ratio changes on motors on the dyno has yield little to nothing in power. even from 1.55 to 1.65.. And Gary, I used to think the same way.. but it only took 900 street miles to mushroom the end of a 5/16 adjustable pushrod working 68/9 rockers.. maybe you have had better luck, but I sure didn't. All brand new TA stuff too.. brand new rockers, and pushrods.. so existing wear issues were not a factor.. it was high stress point contact with the cup/pushrod mismatch. I ran those rockers and 5/16 pushrods on higher load big lift cams in my race motors for years, and never had an issue.. but the street running time vs race running time will really magnify the issue. Did not give it a second thought went I built what was the second street motor after going into the business here 6 years ago.. but got introduced to the difference between race motors that run for minutes at a time, as opposed to street motors that run for hours, sit in traffic ect.. Possibly if we had went to the correct length solid pushrods I might have had better luck, but at the time the answer was to fix the motor, so I had to pony out the dough for just the bigger adjustable end. I was told the solid and adjustable pushrods were the same material on the ends, so did not give much hope to solving it that way.
Thanks for the input Jim et al... I will stick to my cam project for the Winter. I think that's what I said LAST Winter, too. Oh well......one of these days.
Gary Your right, it's been a while back and the alzhimers is getting to me. I went and checked my setup and I did use the 69 shafts, must have gotten confused cause I took the endcaps off and picked all the best rockers that I had and used them. Also using the springs between the rockers. If there's no gain to be had on a street motor then why do people do it? o No: Dave B
I've used the early rockers for many years,before there were roller rockers,mainly because they were stronger,never noticed a performance increase just more reliability.Thumper ran 10's back in the day without roller rockers,with stage 2 iron heads,its all we had. Lasted better than the bathtub type. gary
