Can I use my stock pushrods? 268H cam, stock rockers

[Ristow]

Has anyone had good luck using the chevy studs and lock nuts ? I've done it for years even on hi pro 390's but no matter how I adjust them they're never totally quiet. I don't think I'd do it anymore I'd just get the right pushrods.

i ran studs from summit in mine. i was using 1.7 rockers with 7/16 studs. simple screw in and i never heard them.

[rang-a-stang]

i ran studs from summit in mine. i was using 1.7 rockers with 7/16 studs. simple screw in and i never heard them.

Similiar question so i am going to hijack my own thread.
A) Did your 1.7's fit under stock valve covers?
B) I can just get the standard SBC studs like these, right?
Summit branded 3/8" SBC studs
C) I have read my heads (casting #3216090-1, early 401 heads with screw in studs) don't need guide plates because the opening in the head acts as the pushrod guide (I looked down the hole and it's a slot and my rods have a clean spot where they pass through). Anyone want to confirm I don't need guide plates?

[Ristow]

yeah,sbc studs generally work. and you don't need guide plates. you MUST run hardened pushrods however.


pretty sure the 1.7's would not clear stock covers,but i really don't recall.

[rang-a-stang]

I ended up buying ARP 100-7101 studs (7/16 adjustable off a recommendation from Harland Sharp), Harland Sharp S4004-7 (1.6:1 Rollers) which yielded me a pushrod length of 8.125. Just ordered Comp Cams Chromoly push rods from Amazon.

[rockosocko]

Good morning.

Is this motor going in with an auto trans?
And what gear ratio size tire?
Also, what type/size of carb

I'm kinda trying to decide on either the Comp 268 and a MTA-1 (AMC-360 TH400)
Intake gaskets need attention, so I'd be half way there anyway..

Thanks
E

[rang-a-stang]

Good morning.

Is this motor going in with an auto trans?
And what gear ratio size tire?
Also, what type/size of carb

I'm kinda trying to decide on either the Comp 268 and a MTA-1 (AMC-360 TH400)
Intake gaskets need attention, so I'd be half way there anyway..

Thanks
E

Motor is installed in front of an auto trans (stock TH400 with a mild shift kit and stock converter)
Stock 3.55's (i think... Might be 3.73, whatever came stock in a 79 Cherokee Chief with a 360).
Tires are 285/75-16 (about 32.5" tall)
Running a GM DIY Throttle body injection with computer controlled timing.

Runs pretty well, idle is pretty smooth. I have about 5 miles on the motor so far and am still tuning the EFI. My build thread (link in my signature has more details).

[rockosocko]

Hhhmmm. Makes me want to give that TBI another shot.
Got a few parts off of a rental truck with a big block. But the Throttle body has some huge solenoids/sensors on it that doesn't look 'normal'

So, with that 268 she's idling smooth and no vacuum problems with the IAC when cold?

Thanks for chatting with me to.

E

[jeepman1]

Mine works..

I had my heads surfaced, ran the 268 cam and just ordered original size pushrods, runs good so far w/ stock rockers.