I am swapping in a 78' 4 bolt main 350 into my car. For now I am going to bolt on some different heads. Edelbrock aluminum intake and a built non-cc quadrajet...My question is Will these heads be streetable. I know they are a little smaller valve but they got nice work on them....Just not sure about compression on my motor since they're shaved...Here's the listed desciption.....

"1.94-1.50 VALVES ,I JUST HAD A 3 ANGLE VALVE JOB DONE NOT TOO LONG AGO,THEY HAVE 3/8 SCREW IN STUD AND THEY COME WITH GUIDE PLATES.THE ONLY PORT WORK ON THESE HEADS WAS DONE IN THE BOWL TO CLEAN UP THE VALVE JOB,OH AND THEY HAVE BEEN DRILLED FOR A 400 BLOCK {THATS WHAT I USED THEM ON}.THE SPRINGS ARE GOOD UP TO 600 LIFT AND THEY HAVE BEEN SHAVED TO 62CC"

So what do u think...Good heads...Good Power? I am goin to do a cam and other stuff later but for now I just need my car back on the road with a little power! Thanks!!

 

Sure why not...

If you can get a little more info on them though that would be great. Like the exact PN so you can reference it to Edelbrock to see the complete specs like runner size, cfm rate, etc...

 

You mean the casting number on the heads? 3890462 L215-L295. The cfm is gonna end up around 700 cfm on the carb, my dad is rebuilding and re-jetting it...

 

If they are originally 350 heads, you may be able to have a shop install a set of 2.02/1.60 valves.

Dont take my word for it, but It may be possible.

 

I dont believe those heads will have acc. holes.,,

 

3890462....66-67...302/327/350..Camel hump,no accessory holes,64cc chamber

Pass. They won't fit your car. Unless of sourse you don't mind doing without minor comveniences like .... an alternator. Also, their combustion chamber design is inferior to the later double-humps; those lack the "squish" or "quench" area by the spark plug, and are prone to detonation on modern "fuel". Good heads in their day, that day is 350 years past.

That's why they're for sale cheap in the first place.

 

I have all the bracketry to mount alternator etc... So even those these heads have valve job etc they still wouldn't do good on Today's fuel? Thanks!

 

There is no such bracketry. It doesn't exist. I don't know what you have, in fact I don't even have to know what you have, but it won't fit your car. That's why you can buy those heads so cheap nowadays (not just that individual set, but all of those old heads). They simply don't fit cars made since about 1969.

But yes, starting in 69 they began adapting heads to run on watered-down cat pee, and those won't have that adaptation. What you'll end up with is a motor that you can't run anywhere near an optimum timing curve in, because it will ping so bad. That's another reason why you can buy those old heads so cheap now... you can't get them to run worth a flip on pump gas.

It sounds like you really want those heads. They must be REALLY cheap. If you don't believe me, that's OK, go ahead, it's your money. Just don't be surprised at the rude awakening.

I'd keep looking if I was you.

 

RB83L69, your wrong saying htat those heads wont work. i had them on my l98. yeah, i had to make my own brackets, but they did run on pump gas[93]. i had the alter. with a racket boltes to the intake and to the header. the had the power steering pump mounted in the original place, but i had made a brcket to "wrap" around to the header.

edit: the power steering pump bolts onto the block, the head, and on the water pump. the inly thing it wont bolt into is the heads because there are no accersory holes, but you can have a machine shop tap tehm for you. or, you can make your own brackets. i think march has a set of brakets for this though.

 

Yeah my dad made the brackets. He's a machinist and metal worker. I just got an email back from the guy. He said he ran it on 93 for 4 years with no problem. They have the hardened valve seals and everything. Thanks for your input, It seems you know alot mroe then me. I figure for now I wil ****** these up real cheap and see how they do, if they dont work I will sell them... My dad ran double humps for years and never had a problem so I guess I will probably try my luck!

 

OK... good luck!!

 

Hey RB83L69 thanks for all your help...Its really good to get real answers from someone who knows their stuff. I'll let you how it works...Anyone else have any input be sure to ad it I am not gonna get these heads till next week.. Thanks

 

yeah you can rig them..keep 2 spare belts and 2 alternators handy, you are gonna need them! I had 462's on my 327...I know what you are going to run up against........you can find a better head for the same price.......good luck...you will need it..

 

Not if they are a good shop.....there just isnt enough "meat" for tapping..

 

did I mention Waterpumps???? keep a spare, bearings MUST run true to last.....

 

https://www.thirdgen.org/techbb2/sho...highlight=462s

 

So what problems did you really have with these heads...I am going for a reliable yet powerful 350 for now...If these are gonna be WAY too much trouble I might follow previous adise and pass them up...Also... The auction ends tomorrow so I really need to decide... Thanks

 

RB83L69 has already listed all the problems with those heads. They were good back in the day, but now with cat **** they call gasoline (lmao... :sillylol: ) they don't work to well, let alone that fact that they don't have access. bolt holes, and like said above you can't tap them since there's just not enough meat to do so. RB and Riley know what they're talking about so I suggest you take their advice (and mine) to pass on these. You can get much better heads than these that won't cost you an arm and a leg.

 

Save your money for a "good" set of heads....Why not use the heads off your 305? with a little work they will outflow the 462's. They would be the better choice in stock form IMHO.

http://cgi.ebay.com/ebaymotors/ws/eB...category=33617


http://cgi.ebay.com/ebaymotors/ws/eB...category=33617
( this guy does very nice work, and his service is great! he also carries the 416 casting.

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Always check the sellers feedback!!! Buyer Beware!

What happened with the "Kick A$$ 327 "?

 

They will cost more than the heads!

 

I got the motor out the car to find number 1 cylinder was locked up. I will eventually pull it down, hone it and rebuild it, BUT I need my car back on the road before School starts again and have a very busy summer so I need quickest option as possible. Oh But when I get that L79 running right, It'll be bad!

 

1. I do know what i am talking about.
2. I stated the fact that march makes the brackes because someone sid there is no suck bracketry.

i had different valve seal on my heads. yeah, i had to back the timing down, but they worked. you are right, they arent worth ****, but, they are usable.

 

Never said you didnt!..go here to see te march pullys and brackets...https://www.thirdgen.org/techbb2/sho...hreadid=187964

I believe the alt. still requires the head bolt.....ask Ron. I say save the $200 + on the brackets and use the money for modern heads.

 

I am goin to pass on this deal for now and just leave the stock 78' 1.94/1.5 combo heads on there.Then when money comnes around buy a $400 set off ebay... If anyone is interested in these heads they are still for auction...Just not for me!

Camel Hump Heads

 

$400 will get you a good set of Vortecs and you'll be much happier with them than the 462's.