I need to know what length push rods I will need with this set up. I have the Vortec heads from Summit and the Comps Cam XE268 the rockers are the GM stock for the Vortecs.
I think I could run the stock rods but I thought I would ask.
Thanks, Matt.

The stockers will probably be fine however you should always check for a proper contact pattern between the valve tip and the rocker arm.

I like using a Shapie pen and coloring in the top of a couple valves. Then put the rocker arms on those cylinders and rotate the engine a few times. The rocker will wear off the ink from the Sharpie and show where the rocker tip is riding. The wear mark from the rocker should be centered on the valve tip - changing pushrod length will move the contact point in or out.

Like Eric said, the stockers should be fine. I have the exact same heads/rockers/cam in my truck, and the stock length pushrods are nearly perfect even with the blocked decked slightly (.008).

hey travis,
did you ever run the vortecs on the 388?
i am looking at that combo and wondering how the response/power would turn out.i have the heads and still have the choice of cubic inches.
Eric

whats the lift and duration on that cam mwc67?

Originally posted by SLEEPER 86:
hey travis,
did you ever run the vortecs on the 388?
i am looking at that combo and wondering how the response/power would turn out.i have the heads and still have the choice of cubic inches.
Eric No, but I may be very soon. My pro-toplines are junk...they need 11 guide liners graemlins/sad.gif Since I am loosing my job, I just can't spend the $$$ on them right now until I know whats going to happen. I already have another set of vortecs with screw in studs and guideplates ready to go. The only problem is that my compression will end up about 11.3-1 with the vortecs. I also already have a gm -140 solid lifter cam that is big enough that I still may be able to drive the nova on pump gas. Just waiting for things to warm up around here (its 25* outside right now). Depending on how the job situation works out, I'll either use the vortecs and big cam or keep the 294s in there and get a set of 64-68cc aluminum heads.

z/27 camaro
the DUR. is 268/280 and lift is .477/.480"
The guy who is machining the block says he uses steel brake line to come up with the length then mesure and order the right ones. And that is fine but if I could get the right ones now I could just put it together when hes here helping me and get it degreed and button it up.
Thanks for the info I should post everything one of these days so I can find out aprox HP
Thanks again. graemlins/beers.gif

Without assembling everything, there is no way of knowing exactly what pushrod length will be needed. But again, as long as the block and heads aren't excessively milled, the stock length should be fine. The only way to know for sure is to assemble everything first.