i know the holley # 90 jets are the ones to use to restrict the oil but how do i mount them in the heads? do they just screw into the hole or do i have to pound them in or tack them? i'm about to get to doing this and was just wonder?

 

all you need to do after you remove the rocker shaft is take the jet and slide it down into the oil passage. this passage is the 2nd or 3rd pedistal mount on each head, you'll see the threaded hole for the bolt and the oil passage coming in at an angle. just insert the jet threads first into the hole and thats it.
now, i just did this mod myself while swapping on a new intake, and i gotta tell ya, it would seem as if that jet would almost go around the corner and on down into the passage further, but it stops, about an inch and a half down in the hole....i about had a panic attack when that little bugger slid down in there that far but they stay there.
now, do any of you guys out there know if different head castings and casting differences could ever allow a jet to go all the way down???
anyway, with out scarin ya thats how you do it...............it should slip right into the passage..............

 

Since I'm new to this old discussion, what is the purpose of this mod? Is it to keep more oil going to the bottom end, Since I've heard that the rear main can get starved on F.E.s at high rpm?

 

the restriction is on oil coming up out of the crankcase into the heads. this will keep oil on the rear mains above 4k rpms

 

Anybody have a pic of the exact location of the passage? Or even a really explicit description? I'm afraid haynes is as far as I go, and this isn't exactly something that is covered there.
Thanks

 

All you have to do is pull your valve cover, then pull your rockershaft. And depending on what side of the motor you are working on, it's either next to the second or the third bolt hole back, (under your rocker shaft)

 

is there any special consideration to pulling/putting in my rocker shaft? ie torque specs or anything?

 

You're supposed to loosen and tighten the shaft bolts one turn at a time to gradually, and evenly load and unload the shaft to avoid tweeking it. Hold on....

Okay, here's what Chilton's says:
On right side, start at No. 4 cylinder (rearmost) and loosen the support bolts 2 turns at a time. Remove shaft assm. Same sequence is perfomed on left bank, except that the bolt loosening sequence starts with the No. 5 cylinder. (foremost.)
To install:
Apply lubreplate to rocker pads and push rods...blah blah blah...
Rotate engine to 45 degrees past No. 1 cylinder TDC. Position shaft on head such as that the oil holes are on the bottom, and identification notch is down and toward the front on right bank, and toward rear of left bank. Tighten bolts finger tight.

On right bank, start at #4 cylinder and tighten support bolts 2 turns at a time in sequence (4-3-2-1) untill the supports are fully in contact with the head. Then tighten the support bolts to 40-45 ft lbs torque. The same procedure is followed on the left bank, starting with the #5 cylinder.

 

yes thats the correct method, however, if your carefull and do the one turn at a time on the bolts that works as well, especially if its stock cam and valve springs as theres less stress on the rocker shaft. the most important part of doing this is re- assembling the rocker shaft to the head. start slow and make sure all the push rods ends are still in the lifters by shining a flash light down into the lifer valley..........it will be harder to see them if the stock metal baffle is on but you should be able to see them. then slowly make sure the other end of the push rod is in the rocker arm and start the bolts. after their snug use one turn or so to start to cinch them down occasionally rotating and checking the push rods to make sure their still all in place. i recently did this and found a push rod was not in the lifter and im glad i cought it before tightening them down any further.
it's really not a hard job at all and after you do it you'll have it down pat, and remeber if you cant rmember how something goes you have an exact model on the other side to look at........5 valve cover bolts each side, 4 rocker arm shaft bolts on each side, 2 holley jets and some greasy hands plus some valve cover gaskets and your done!!!!!!!!!!!