So I did a few searches and couldn't quite find the info I think I need to point me in the right direction. I did learn a lot from the threads I read though A little background:

I have a running 460 that was in a truck that I ended up parting out. It will be used in my daily driver '78 F250 Crew Cab 4x4 with NP 435 & 4:10's, 35" tires. Occasionally I'll put my camper on it and tow my Early Bronco behind it.

It's got dished pistons (22cc) & D3 heads, bored over .030". My goal is to freshen up the motor with new bearings, rings, OP, timing chain, cam, intake and am planning on "freshening" up the heads. Will replace springs if needed to match the cam.

So here's my question:

I have a set of D0VE heads also. Should I freshen up the D0VE heads and put them on or the D3 heads? Did some quick calculations and it looks like with the D0VE heads I'll have a 8.9:1 Compr Ratio vs with the D3VE heads I'd have a 7.8:1 Compr ratio.

Thanks for your help.

 

I still vote you/we pull the motor out of your SCS and rebuild that one, drop the motor on your stand in the SCS.

Between the 2 sets of heads, the DOVE-C heads are set up to accept screw in studs with adjustable rockers and do not have the Emissions hump in the exhaust port. Just doing those two things to the D3VE-A2A heads will offset your machining cost.

Both heads have the same valve sizes and ports are measured the same (this does not factor in the Emissions hump).

I feel either projected CR is low, ideally I would shoot for 9.5-1 to 10-1 CR.

Do you know which block the SCS has? The earlier blocks have a 10.300" deck height and the D1-newer have a 10.310" deck height.

You have my phone number.

 

Curious why you would take basically a tow motor to 9.5-1 to 10-1 CR ? and confining it to burn higher octane fuel ? What does he do when he's out in the wild 200 miles from octane booster and they only have 87 octane ?

 

I guess I'm at an advantage as I know what all he has.

There's no reason a vehicle can't run 10-1 CR on pump gas with an efficient cooling system, which he already has.

He has a 460 with the D3VE-A2A heads and it's a stock motor, sitting on his stand, I sold him an intake for it.

He also recently got an SCS truck that has a 460 with D0VE-C heads, Torquer 2 intake, MSD distributor, and some other nice parts on it.

I told him that if it was me I would swap the stock motor into the SCS and build the motor that already has the better heads and nicer parts, yes it's a little more work but I'm also willing to help him with doing it.

 

"Pump gas" 87-89-91 octane .. With this build 91 octane .. My point is it's not available every where all the time and when you take it to the back woods that could be a problem unless your prepared ..

 

I decided to rework the D0VE heads. Ordered a Comp Cam kit with new springs & such. Will sell off the D3 heads.

You keep forgetting John.......I'm lazy.....and don't want to mess with the SCS

Ryan

 

But you also have someone happy to help with the work just for an excuse to get out of the house.

I'll swap my motor and the motor in the SCS, just say when.