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Topic Review (Newest First)
01-05-2013 01:27 PM
gvasquez_81 The casting number is 3890462
01-05-2013 09:48 AM
cobalt327 You missed 3990462.
01-05-2013 08:12 AM
cdminter59
Quote:
Originally Posted by gvasquez_81 View Post
I just found out that a relative of mine has 462 heads. He said that they came off a running engine and that he was gonna use them but didnt have time. and $150 bucks you cant beat. I know that because of the 64cc it will boost my compression the only thing that im having trouble with is finding brackets for my alternator and power steering? Any advice?
What is the complete casting number number. I found 3782462 327 1967 1.94/1.5 or 2.02/1.6. 3890462 62-68 302/327/350 1.94/1.5 or 2.02/1.6. 3891462 62-67 302/327/350 1.94/1.5 or 2.02/1.6. 3767462 327 62-67 1.72/1.5. 3814462 350 67 1.94/1.5
01-05-2013 07:31 AM
cdminter59
Help With Heads!

You take a head off. Then take some modeling clay about 1/4" thick place on top of the pistons. Reassembly the head and adjust the valves. Turn the engine over a couple of revolutions. Remove the head and measure the thickness of the clay where the imprint of the valve is. Clearance should be .080 intake, .100 on exhaust.
01-05-2013 01:31 AM
gvasquez_81 How am i able to check?
01-05-2013 01:03 AM
F-BIRD'88 Don't ask. Dissassemble and eheck for your self. aprox .480" on thie with stock rockers.
The pressed in studs tend to come out on those too.

When nicely ported they make very very good power.
01-05-2013 12:57 AM
gvasquez_81 vortec heads would be ideal. thats all i hear about. to be honest i was considering it. i just didnt feel like spending another $150 for valve cover adapters considering i just got new valve covers, and buying a new intake. I figured choosing the camel backs would be the best option other than vortecs and aftermarket heads, after all this is just a street cruiser.

And not be confused i was wondering the max lift on the cam with the camel backs? any clearance issues?
01-05-2013 12:53 AM
F-BIRD'88 Do not drill the heads. Get the brackets from Chevrolet Steel Mounting Brackets

or fab your own.
01-04-2013 11:46 PM
cobalt327
Quote:
Originally Posted by gvasquez_81 View Post
i heard that you run into the risk of ruining them. Just something about drilling the heads seems not right to me.
"...something about drilling the heads seems not right to me". Because it's not right to drill them.The problem isn't so much that you may hit water- you WILL hit water. But the casting isn't thick enough to always support the load the brackets put on them, and the head surfaces aren't always flat so alignment can be off. People have done this and gotten away w/it- but there are a lot who regretted not doing it the right way from the get-go.

The easiest/cheapest way around this is to swap over to the ('68-back) short water pump set up. The only snafu is the A/C compressor used back then was the big old A4 type. If headers are used there are different brackets from the aftermarket that need to be used for the alternator, but these are cheap. Custom brackets that don't require the head accessory holes will also work, but are expensive and I personally do not care for their looks. If custom brackets were the only option, Vortec heads are looking more affordable, besides making more HP than any of the other heads you've mentioned.
01-04-2013 11:33 PM
vinniekq2 just over 200 CFM at .6
01-04-2013 11:20 PM
gvasquez_81 Does any one know what the max lift was on the 462's? Just curious about some info on them?
01-04-2013 06:14 PM
hcompton
Quote:
Originally Posted by gvasquez_81 View Post
Another question guys. im not sure if the 462 heads have hardened valves? is it absolutely necessary to run hardened valves? or can i get away with adding a lead additive every once in a while? while it do anything to my engine? thanks
You can drive then til the seats are beat to death and that takes a long time with or without the lead additive. But harden valve seats are not hard to have installed.

Fyi is there an X on the under side of one port. If so you can probably get more for these on ebay than a new set of trick flow or world heads.
01-04-2013 06:11 PM
gvasquez_81 Another question guys. im not sure if the 462 heads have hardened valves? is it absolutely necessary to run hardened valves? or can i get away with adding a lead additive every once in a while? while it do anything to my engine? thanks
01-04-2013 03:36 PM
gvasquez_81 You read my mind!
01-04-2013 03:33 PM
RWENUTS THis guy can set you up with brackets.
Chevrolet Steel Mounting Brackets
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