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(((((Quote Originally Posted by AMX69PHATTY View Post
I have a '69 343 block fitted with a 3.44 stroke 304/360 crank.

Now I have bought the Harland Sharp 1.6 AMC Rockers.
To make the geometry...

Thank you for this post! I am too in the process of ditching Crane energizer AMC, Ford, Chevy rockers and installing Harland Sharp 1.6 rockers on my 401....just finished checking pushrod length....I...

Bob,
Thanks for all your replies, they have been very helpful!

Talked with both Harland Sharp & Scorpion this morning. They both indicated their rocker arm sets are the same body as Ford. ...

Ok guys, need more advise on this subject....got my heads back, while the shop had them I had the pedestals milled down as discussed above anticipating it would make my existing roller rocker arm...

Makes sense and matches what I calculated. Thanks for the explanation! Still thinking about cams, I have run both the edelbrock performer and the summit k8600 in my 401. I felt I lost some low-end...

Sorry to beat this to death, but I had to know where .25"+guide thickness comes in...so I mocked up stock vs. my crane rockers/studs and find the difference between the center pivot points are...

yes, I drilled and re-tapped for 7/16 studs...and that is what I was thinking. Appreciate your input!

Sent my heads in to have a the burnt valve replaced and the rest checked over. Shop found all the exh valve guides to be junk! THe worst he's ever seen! While these were completly rebuilt about 8...

Thanks for your input. Roller is nowhere near the keeper, and the rocker arm pivot "slot" does not touch the stud or nut, Running trickflow 5/16" rods, etc....so I think I'm good. I have the heads...

Long story, but an engine guy suggested I try running roller rockers in my 401 w/o machining the pedestals down by compensating with longer pushrods. I have been running this motor for several years...

Disconnecting the vacuum adv made an improvement...I'm running 32 degrees total w/o much issue and have gained back a bunch of HP (from the seat of the pants perspective). Put my trailer on (w/only...

Interesting....this spring I found that the vacuum advance had leak and replaced it (and I have a fair amount of vacuum due to running a small carb). My detonation was not really noticable until I...

I've been struggling w/some detonation in my 401 when I tip into the throttle when cruising...for a hill, to pass w/o downshifting, etc. especially if I have my M416 trailer on loaded w/gear. I have...