¿Gen III cam in Gen I block?

[2.8-350TBI]

Im in the midst of planning a 3400 head swap on my TBI 2.8, and wanted to know if I can use a gen III cam in my gen I block. Im getting the 3400's heads, pushrods, and lifters soon, and want to know in which direction im heading...

Also, before the cam swap, can I use the 2.8 cam w/ the 3400 lifters and pushrods, or what would be the ideal setup for the valvetrain?

[bszopi]

Since the 3x00 cam is a roller cam, you need roller lifters. For roller lifters, you need some type of anti-rotation device. Standard roller lifters with anti-rotation bars won't work because the spacing is different for the 60 degree engine lifter bores. Gen 3 blocks have provisions to bolt an anti-rotation block to the engine block. In order to do this on a Gen 1 or 2 block, the block itself would have to be modified to make it work. Its been done before, so it is possible. Just not sure its really worth it.

[ForcedFirebird]

Brad, don't forget the lifter galley being covered after a certain amount of lift.

This topic has been duiscussed many times.

also, don't forget, if you go to the roller cam, your timing chain options are going to be limited.

[Superdave]

you are much better off going with an aftermarket flat tappet cam, the stock gen3 cam isn't much better than what you have now.

A Comp 260H is a fairly common choice, it'll like the better heads you are using as well.

[ForcedFirebird]

Eww.

Not a fan of the 260h outside a stock P(E)CM with no tuning.

[Superdave]

Eww.

Not a fan of the 260h outside a stock P(E)CM with no tuning.

with the 1.6 rockers that puts it up to .469 lift with 260 adv on a 110 LSA, not extreme but better than the stock cam for sure.

the Crane H272-2 would be great but it's kinda hard to find those any more.. lol

[ForcedFirebird]

with the 1.6 rockers that puts it up to .469 lift with 260 adv on a 110 LSA, not extreme but better than the stock cam for sure.

the Crane H272-2 would be great but it's kinda hard to find those any more.. lol

Not if you buy a flat tappet cam from me

[2.8-350TBI]

So all this means im sticking with my hydraulic lifters and a hydraulic lifter cam then.
Are the hydraulic lifters compatible with the 3400 pushrods???

It seems like I can source a crane H272-2...
Although its kinda expensive, if any of you guys have a hydraulic lifter cam under $200, hit me up

[2.8-350TBI]

P.S., ill be using MEGASQUIRT II

[Superdave]

you will need custom length pushrods when using gen 3 heads on a gen1/2 block.

[ForcedFirebird]

Maybe need custom pushrods, maybe not. The Gen 2 pushrods are close, but will need to be measured at final assembly.

Flat tappet cams are $290 and that includes new magnum lifters.

[2.8-350TBI]

Thanks for the input guys, I will measure once im ready to start the project

ForcedFierebird, what are the specs on the flat tappets?
Im looking for something around 260 degrees plus, pleferrably above 272

[DefEddie]

Hey forced,if that cam and lifter kit comes with all the other stuff similar to this one
http://www.summitracing.com/parts/CCA-K16-233-4 timing set,springs,retainers etc..
and is a similar grind then I might be interested in that in the coming weeks.
PM me if you can do something similar,I need a cam kit.