Valve covers came off smooth, heads don't want to budge, intake manifold doesn't want to budge, starting to get alittle aggitated with it. Next thing I am going to attempt is getting my friends air compressor and taking a torque wrench to it. Hoping it doest strip the threads. There are some numbers on the heads that I can read and there was 462624 and J 313 there was also GM on the other side of it. there are 4 bolts holding the heads down, none seems to want to budge. Should I use WD 40 on them???

I am also looking at buying these set of heads from Jegs.

SB-Chevy E-Tec 170, Complete (each) part #350-60979
SB-Chevy E-Tec 170, Complete (each) part #350-60979

Carbuerator
http://store.summitracing.com/partde...art=EDL%2D1400

I really like the price of these... building on a fairly tight budget...

They make adapters cause I have the 4 hole intake manifold while the Carb, use's a square bore, or do I already have the adapter on mine??? I'll post a pic of the intake soon.

 

624 heads are garbage. They are one of the castings responsible for those 165 HP 350s of the 70s that we all grew to love. Please don't put them back on; have them melted down for thier cast iron or otherwise destroyed as soon as possible, to do your part to erase this disgrace from the collective memory of mankind. It doesn't matter that they're supposedly "out of a Vette"; those were just as pitifully slow in those days as anything else, since their motors were the same trash as anything else (Impalas, Malibus, Novas, etc.). Get the stars out of your eyes and lose the idea that some sort of magical properties wafted up out of the fiberglass and somehow improved the cast iron.

There are 12 bolts holding the intake on, 6 down each side. There are 17 bolts holding down each head: 7 long, 2 medium at the ends of the heads down in a recess where they're hard to see, and 8 short ones below the exhaust manifold flange. Make sure you take them all out before attempting to remove the parts. WD-40 is useless. Use a long ½" breaker bar and a 6-point socket to remove the head bolts. The parts will definitely want to stay stuck in place by their gaskets; they'll require some prying or other persuasion to get them off.

 

Should those heads at Jegs that I have linked too work well?? Stock the engine was kickin' 280 ft/lb of torque, I want it up near about 350-400. I am thinking aluminum heads/lifters, heddman headers, 600 cfm edelbrock, Y pipe and flowmasters, should get me around that? I am also thinking about getting a better cam to throw in it also. It will be mostly for show and daily driven, as to racing.. Hoping to have all finished before the gathering 8

 

280 ft-lbs of torque is pitiful. Alot of 305s can do better than that. 350-400 is a walk in the park for a properly built 350.

Yes those heads are OK. Keep in mind that they have the raised ports like Vortec heads, and so will require a different intake. A regular SBC intake won't even cover their intake ports, mucxh less match up to them.

Yes you will need a different cam. The "929" cam that came in those crappy 70s motors is another part of the total package that made them so altogether gutless.

 

I appreciate all the info, my friend was telling me to keep the heads, and the intake manifold. But I know I am not going to do that. Should I be able to find me a 5700 vortec engine and rip the intake manifold off of it and get an adapter and go carb. or will I also have to go fuel inject... I really perf carb over fi cause I don't have to deal with all the wires and less money...

 

Don't bother with a bunch of junk stock 2-barrel TBI intakes and adapters. There are vastly superior intakes available in the aftermarket, including from GM and Edelbrock.

For a cam, look at the Comp XE262.

 

Ok well I picked out the cam I wanted I went with a comp cam 268H, the heads I am looking at now are made by world products, they are the SB-chevy S/R torquer Heads, but I am not sure what the difference is in the 76cc and the 67cc, I am guess the cc's I go the better the performance, but I just want this to be a regular street car with alittle something behind it, so would the 67cc work fine for me???

 

Tricked out: The Edelbrock etec heads you chose
are the better choice.

They require a Vortec style intake manifold.
Here is a good source for a vortec manifold if you're on a tight budget. They work well.
There are many available to buy new on EBAY.
www.professional-products.com

A good alternative to the etecs are the Edelbrock Performer RPM heads. They use a conventional intake manidold.

The S/R's are a stock replacement head. Not much performance gain for the $$$ without porting.

Protopline Lightning and Trickflow 23deg heads are good and in the same $$$ range too.

use the 750cfm Edelbrock carb. its a better carb for you.