Valetrain geometry question

[Orange71SE]

Hi guys, i am in the process of build a 440 RB, I currently have aluminum e street eddy heads and planning on using the .509 Purple flat tappet cam. I was wondering if anyone thinks i will encounter any valvetrain problems buy using Hughes 1.6 roller rockers? http://www.hughesengines.com/Index/...a2VyIEFybXMgJiBBY2Nlc3Nvcmllcw==&partid=26893
Sorry if this might seem like a noob question but this is my first time building an engine.

 

[PurpleBeeper]

I am about to find out too (sort of). I'm running a set of E-streets with stock rockers and a smaller cam. The heads are listed to accept 3/8" pushrods, but man-o-man those holes look tight. I plan to mock up the motor & grind away metal if necessary. It does look like there's plenty of meat there on the heads.

 

[snakeoil24]

I would skip the aluminum rockers entirely and get a good set of steel adjustable rockers. They will stay in adjustment much longer without any head aches of using aluminum.

 

[Orange71SE]

I would skip the aluminum rockers entirely and get a good set of steel adjustable rockers. They will stay in adjustment much longer without any head aches of using aluminum.

Where can i get these steel rocker arms and are they also 1.6 ratio arms?

 

[lewtot184]

I use crane gold 1.5's with RPM heads. i'm using the valves edelbrock supplies with no major mods to the heads. what I found was a geometry issue that required spacing the shafts up .030". I use a solid cam but the Crane solid lifter push rods (shelf push rods) were too short and needed custom longer push rods. so my advice is carefully check geometry and get a checking push rod because I don't think any shelf push rods will work properly with these heads. you shouldn't have any issue with alum rockers, the .509 cam, and edelbrocks springs.

 

[66Satellite47]

My EDE RPM heads also wanted .030 shims. Check everything.

 

[lewtot184]

those edelbrock heads are a true bolt on in the respect they bolt to the block. other than that expect adders.

 

[biomedtechguy]

.509 Purple flat tappet cam

292° .509 purple stripe cam, old school variety, is what I have. Came installed in the car. Sounds great, runs great IMO.

 

[66Satellite47]

Piston to valve is still always a question. Need to check that for sure.