Heads?

[Clay Harrison]

I need to clean this off a bit better but it looks like I'm seeing this number.
2406518 and My mopar says this. 426 Max Wedge 1964 2.08 1.88

The motor is a 66 New Yorker 440 TNT. Does this sound right?

 

[detmatt]

Most likely #516 with 1.60 exhaust.

 

[CBODY67]

Looks more like 516, to me. Sometimes, you have to look closer than normal or even gently put some paint/chalk on the numbers for best visibility. The "normal" B/RB cyl head pre-906s. Nothing wrong with them, per se, just that the exhaust valves are the normal 1.60s rather than the later 1.75s. An easy upgrade that can coincide with "hard seat" installation. The 1.88s were the max size for an engine that was being maxed-out for flat-out racing competitions, when every extra horsepower counted and could mean the difference between winning and otherwise.

Clean them up, port match the intake gasket, possibly a little more clean-up, but not much more. These were also the "closed chamber" heads which combustion chamber design later came back into favor. So, nothing wrong with them at all, for a generally stock motor, or even one a bit hotter.

CBODY67

 

[Clay Harrison]

haha I need to clean the muck off of this thing.

 

[Newport 66]

If they were Max Wedge heads, they would require a different intake and exhaust manifolds to match the ports, than the more common big block heads (906,516 etc)

 

[detmatt]

They’re good closed chamber castings that would very easily accept bigger valves.

 

[Clay Harrison]

Thanks guys!

 

[CS23T1]

Decent heads for mild builds, and a good swap for bumping compression on smog big blocks.

 

[Ripinator]

I need to clean this off a bit better but it looks like I'm seeing this number.
2406518 and My mopar says this. 426 Max Wedge 1964 2.08 1.88

The motor is a 66 New Yorker 440 TNT. Does this sound right?

View attachment 250768

View attachment 250769

These heads are the same as those on my '66 300. For a mild street-build, they will work well - even with the 1.60 exhaust valves. You can compensate - somewhat for this - by installing a dual pattern cam with a little more duration on the exhaust. I did this, and my engine runs really well with this setup.

BTW, the only thing that makes a '66 440 engine a 365 horse TNT is the addition of dual exhaust and a twin snorkel air cleaner. Otherwise the engines for the standard 350 horse and 365 horse TNT are identical.

 

[Clay Harrison]

Rip, your inbox is full!

 

[Ripinator]

Rip, your inbox is full!

Krap!! Didn't know I was that popular. Stand by. I'll fix it.

 

[Ripinator]

Rip, your inbox is full!

Clay: .I cleaned up the in-box.

 

[70bigblockdodge]

What they said.

 

[Clay Harrison]

Clay: .I cleaned up the in-box.

I sent you a message...