i started workin on my engine just lately. i finally got off my butt and took off the valve covers. i got the numbers to my heads and i was wonderin if anyone knows if they r a piece. heres the number. 14014416. i couldnt find my casting number for the block yet but i found out so far these were used on a 305 and thats bout all i guess. can anyone tell me if they have been used on anythyng else and if they have any meaning to life? thanx

 

They're 305 heads, from about 82 to about 86.

Being that they're small block chevy heads, they'll fit on ANY small block Chevy from 55 to maybe today, any size from 262.5 to 400.

They contain no information about what motor they're bolted to, since they'll bolt to such an ENORMOUS variety.

What is it you're really asking?

What car/motor is this?

 

The 416's were factory installed on carbed and TPI EFI 305's up to 86.
All had 1.84x 1.50" valves and 58cc chambers.

Yes they have good performance potential. Will need larger 1.94x 1.60" valves, full porting and rockers pinned.

You can get 230+cfm intake flow and 180+ex with a full home port effort and 1.94x1.60" valves.
After chamber deshrouding for the larger valves, chamber size will be low to mid 60cc range. Max flat milling will get you 52cc.

Once fully modded they have 430hp potential on a 350 with the rest of the supporting hi perf parts. (intake,valvetrain, exhaust)

An easy cheap way to boost the cr of factory low compression 350's making them a popular budget head swap. Search Sitting Bull's and my old posts for more info on modding these heads for performance use.
For mild and moderate performance builds, they work very well. Here is a pic of a ported and deshrouded chamber.
vale size is 1.94x1.60" chamber size is 61cc.

 

ok with that info and to answer ur question. the guy i bought the car/engine from swore it was a 350. but i doubt he did the work to fit the heads to the 350. i wasnt sure wat size it was really. i couldnt find the cast numbers on the block so i was goin with the heads and all. so where r some sneaky spots that these casting numbers could be for the block? also if i were to port these heads and do all that stuff. is it cheaper to do that or just get some new heads?

 

There's no "work" required to "fit" those heads to a 350. That's what I'm saying: they just bolt right up, same as about any others.

The block casting number is always in the same place on a block; has been since 1955. They're right out in the open, conveniently located in an easy-to-see place: on top of the bell housing flange, immediately behind the driver's side head. The last 3 digits are cast into the sides of the block as well, visible from underneath.

Porting is always cheaper than new heads, IF YOU DO IT YOURSELF. If you have to pay somebody to do it for you, new heads are cheaper. Porting takes time, and good porters charge alot per hour; so if you want something better than just some hack "hogging em out", you pay for lots of hours and lots of $$$ per hour. Plus, new aftermarket heads usually outperform all but the VERY BEST ported stockers. And, parts and additional machine steps add up REAL QUICK; valves, studs, guide plates, milling drilling & tapping the bossees, cutting out the spring pockets, cutting down the guides, and on and on and on. The bill can pile up equal to brand-new ones AOT easier than it might at first seem. So it's REAL REAL EASY to end up paying more for ported stockers, than a superior set of others would cost, even if you get the castings FOR FREE. Kind of odd maybe that "free" can cost more than "expensive" by the time the motor runs; but that's the reality.

People always "swear" that these cars have 350s in them. "Runs too good to be a 305"; "same as a Vette" or "out of a Vette"; etc. You hear it all the time. Funny thing is though, about 90% of them magically turn back into 305s at some point during the drive home, after the cash has already changed hands. You're right to be skeptical. But the head casting # isn't any kind of reliable indication of what the motor is, let alone "proof"; you really have no choice but to dig down to the casting numbers for that.

 

To see the block casting number look down behind the drivers side cylinder head at the transmission mounting flange.
I port my heads myself and have a machine shop perform a valve job and shorten the guide bosses for high lift as well as aftermarket valve stem seals. resurface if nessessary. I drill and pin the rocker studs. I assemble them myself. All said and done with new larger valves, springs, shims and seals it's about 1/2 the cost of assembled aftermarket heads.

Recently bought assembled Dart 180cc Iron Eagle heads.
Flow test on the stock castings was a real dissapointment.
Not what Dart says they flow. not near. I'm having to spend as much time on the Darts, as I spend on stock castings.
Not all aftermarket heads are this bad but 165 and 180cc Darts need to be ported.

 

ok well i knew they bolt right up. but they will work on a 350 just bolting up. it sounds too nice. and this project has been nuthin nice. lol

 

Is there something vague in there? Anything I can clarify?

Just because they "came on" a 305 originally, doesn't mean squat about them being on a 350 (or not) right now.

 

If that's the casting # you're seeing, there's a very high chance they are sitting on a 305. I mean, unless someone dropped in a 350, and kept the 305 heads. Chances are much higher that it's all just stock stuff there.

Those heads bolt onto a 350 just fine. See sig.