i want to do a mild upgrade on my engine with a new cam, but that is pretty complicated, plus i heard if i switched to a larger ratio rocker arms it would have the same effect, say from the stock 1.73 to maybe like a 1.8? the problem i am facing is that i can not find any that fit my engine, plus i dont know if i have screw in studs or not. my engine is the stock 460 that came in the truck from the factory, so any help is greatly appreciated.

1977 F250 460
C6 B&M transpak
MSD 6A, Hedman, K&N,
dual flowmaster 40 series

 

If the motor is bone stock, then you won't have screw in studs. I believe the last 460 to recieve nice screw in studs was in like 73'. As far as the rocker ratio goes, don't really know. I'm pretty sure you can convert your current rockers to the screw in stud type, but I'm not positive.

TBirdGuy

"Stuck with a m*par, Settle for a ch*vy, Happy with a Ford!!!!"

 

You would need to have your heads machined to accept the screw in studs.

chris
79 F-150 Ranger Lariat, 2wd, RC, LB, 460 (intake, headers, cam), C-6(shift kit).

79 mustang (work in progress...its just slow progress)
98 Chevy 4x4 (work truck)
95 Lexus SC300 (wife's baby)

 

Crane makes a conversion for pedistal mount rockers to use rollers. I havent had any experience with them.

Nathan

 

I have the crane conversion on my 400. Seems to work.

 

The last regular production 429/460 vehicle to have screw-in studs was the '71. PI engines had them through '72, with 92cc chambers. I've heard that some PI engines had them in '73/74, but with '72 casting numbers.

If you do go to a BB Chevy rocker arm or pedestal conversion for a higher ratio, be certain you check your valve train geometry, especially push rod length.

 

if your doing just a mild upgrade i wouldn't waste the cash.. your not going to see that much of an increase in power to justify 1.8's .. just stay with the 1.73's they will work great and give you plenty of power..

 

F.Y.I. I have a PI from a 74 galxie PI and the head castings are d2 and they do have screw in studs, huge chambers but good valvetrain and cj style rods... oh well can't win them all.


Brian