440 build

With the motor came new sealed power rockers/shafts...am I asking for a disaster?

Sounds like a fairly hot built. Reading Dulcichs' BB porting articles (highly recommended) iirc you're better off staying with the stock valve sizes with the "early" (915/906) heads unless you are a skilled porter with a flow bench & the "later" 452's (& 346's iirc) are a FAR better choice for larger valves/careful backyard porting. I would use the MP templates on the 906's (std valve sizes) & if using those templates on 2.14/1.81's on the later heads you'd need to cut the templates wider the amount of the valve increase. .030" wider per side (2.14-2.08= .060" & divide that in half) for the intakes for example. there's actually enough room on the template sheet to cut out the originals for 906's then trace em wider on the extra sheet space using the curved edge on each side of the template to go out wider for new patterns. EDIT I would not purchase that cam/pistons if you do not already have them (trw 2355's are very heavy). What was up with the OE rods?

.509

Unfortunately 2355's and a 509 I already own...can I make it work?

Yes you can. degree it/check VP clearance/measure SCR

don't know if it is to big for your combo, but i do have a edelbrock 800 thunder series carb with maybe 200 miles on it,worked awesome on my set-up similiar to yours,decided to put a 6 pak on,otherwise a great carb., but the one thing i didn't like was it actually "looks" small on a 440, but i do also have the street/strip holley dominator intake if you are interested pm me, good luck Darren

I would run a real 509 in that combo in a heart beat, but I would not have bought the "revised" 509. You've got a solid set up though, it will run strong if the tune up is right.

You can run stock rockers but you need to measure the push rods and get the correct length pushrods to do it right.

750 Holley for the street 850 at the most even with the 2.14/1.81 valves and stock ports.
Pick yourself up a nice set of Ductile adjustable rockes and your good to go.

I'm not a huge fan of the 509 for your application. I guess you can advance it some and it wil work better. As for the valve train, yes you can and I don't think you'll have any issues, as long as it's new. As for a carb it depends on what you want to do. If you just want a decent cruiser an 800 thunder would be ok, if you want max performance a Holley HP series would be best. Good luck. I hope you are using headers and a decent exhaust.

I think the default 500hp 440 build up is still in the tech archives. Your pretty much there.

Without doing the REQUIRED porting putting the larger valves in the 906's is a complete waste of time and money, you gain nothing other than a fresh, unsunk valve seat.

Plus once you pay for that work you could have bought a set of Ebrock heads and have less of a chance of having to mix race gas because your compression will be too high with no quench and those 906's.

Thanks for all the help guys. This won't be a race car but I want it to run strong. I went back and fourth between the Eddy RPM and Street Dominator, figured since its a heavy car I'd use the RPM...am I loosing noticeable top end power with it? I want it to light up the tires with ease.

All I can add is the SD is very low profile and the RPM is VERY tall. I dont think you'll have a problem lighting em up either way. If hood clearance will allow (a low profile air cleaner can take care of some of that) I'd probably go with the RPM & it is a dual plane square bore flange & the SD is a single plane spread bore flange