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Old 02-05-2014, 06:47 PM   #1
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Pushrod Length 67 289?

I had a rattling rocker arm. Turned out to be No. 1, tightened it and it began pulling out the crappy pressed in stud. So I pulled the heads and had screw studs installed (solved one problem). So the new studs are now 3/8" and my old rocker arms will not work. I got the car last year and don't know the cam brand or cam specs (it's a mild cam). I ordered Comp Cam 3/8" rocker arms with roller tips and 1.6 ratio, so standard for the most part. The block is 289 and the heads are 302 with non-rail rocker arms.
So the magic question is: Can I use the original push rods or do the roller tips change the required pushrod length?
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289 - Holley 4150 570cfm; Performer intake; mild cam; MSD HEI; 302 heads; Roller Tips; Hedman Tri-Y headers; H-pipe w/Flowmaster 40's; 9 in posi 3.50; 205/50-17F; 225/50-17R.
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Old 02-10-2014, 09:43 PM   #2
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Got it figured out and it's up and running again. Talked to the comp cams tech guy and it's designed for a stock rocker arm swap. So now it's got screw in studs and roller tip rocker arms. It seems to run better, the roller tips are supposed to add some HP. It's more efficient and it think the valves operate more precisely.
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289 - Holley 4150 570cfm; Performer intake; mild cam; MSD HEI; 302 heads; Roller Tips; Hedman Tri-Y headers; H-pipe w/Flowmaster 40's; 9 in posi 3.50; 205/50-17F; 225/50-17R.
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Old 02-10-2014, 09:53 PM   #3
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Quote:
Originally Posted by Aggiesrok View Post
Got it figured out and it's up and running again. Talked to the comp cams tech guy and it's designed for a stock rocker arm swap. So now it's got screw in studs and roller tip rocker arms. It seems to run better, the roller tips are supposed to add some HP. It's more efficient and it think the valves operate more precisely.

So you were able to use your stock ones?
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Old 02-10-2014, 11:44 PM   #4
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Yeah no change needed
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289 - Holley 4150 570cfm; Performer intake; mild cam; MSD HEI; 302 heads; Roller Tips; Hedman Tri-Y headers; H-pipe w/Flowmaster 40's; 9 in posi 3.50; 205/50-17F; 225/50-17R.
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Old 02-11-2014, 03:59 AM   #5
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Nice
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