454-420: are they full roller?
 

I opened mine and they are regular lifters but roller rockers.
I thought they were full roller!

So what is your guess ? How were they built out from factory?
Roller lifter only ?
Roller rockers only ?
Roller all the way?

Thanks!

Re: 454-420: are they full roller?
 

mine had the crane gold...

Re: 454-420: are they full roller?
 

Flat Tappet Hydraulic Cam, Gold Crane Roller Rockers

Re: 454-420: are they full roller?
 

EXACTLY. :D

Re: 454-420: are they full roller?
 

that's what I have too. So they really are 420's, Thanks guys!

Re: 454-420: are they full roller?
 

I always thought those 420's were good motors! good foundation to build some power on! :cool:

Re: 454-420: are they full roller?
 

They are a good foundation. 990 or 188 casting square port heads. Steel crank, 7/16 rods, and 4 bolt mains.


Cam change, Intake and Carb change, Good exhaust, They will make around 500HP

Re: 454-420: are they full roller?
 

apparently they are...my engine builder will make it 500-520 with only blueprint and full hydraulique cam. they then would be ready for step 2 somedays...blowers.

Re: 454-420: are they full roller?
 

I built a 454 420 clone but I bored mine over .030 and balanced and used large oval port head with big valves that are ported and flowed, an rpm air-gap intake. My machine shop told around 475-500hp. I know it sure runs nice and strong.

Re: 454-420: are they full roller?
 

I opened one and it was roller lifter, but standard rockers, mild dome pistons, and 502 marine heads. ummm, something sounds strange....