Mlunsford33

Could some one please tell me in detail how too advance the timing on this motor please it is all orginal motor I have a 600 edelbrock 4b on it with a edelbrock breather I have ordered long tube headers also whyle in neutral it runs fine can rev it up slowly but if you try too lay on the fuel it will try and die out also whyle driving it does the same thing any pics and info would be greatly appreciated

Mlunsford33

olds 307 and 403

First off it could be the Edelbrock carb, many have issues with them. The timing advance is done by loosening a hold down to right of the base. Advancing, push the vacuum advance towards the firewall. You want 20 degrees at idle with the vacuum advance unhooked with the hose plugged.

Mlunsford33

So loosen the hold down on right side of distributor take the hose off and plug it and turn clockwise ? Thanks for the response

olds 307 and 403

Yes. The rotation of the rotor is counterclockwise but turning the vacuum advance clockwise advances timing.

Mlunsford33

Okay thank so when I lossen it and turn the distributor how far do I turn it

olds 307 and 403

A timing light is best to see exactly where it is. Basically go until it cranks over hard then turn it back a bit.

Mlunsford33

So got my headers was attempting too I stall them broke too manifold bolts on passenger side and I cant get a drill in there I've tried vise grips can anyone help

Mlunsford33

brownbomber77

Oh jesus......unfortunately, if you super heat it with acetylene and it doesn't come out, it will most definitely need to come off the engine and get drilled out. Man, that sucks. BUT if you do need to pull the head off, may as well pull the other off and replace with a set of earlier heads. Sorry to be the bearer of bad news....

olds 307 and 403

The top center one can be left as is. Many leave that bolt out with headers. An angle drill should reach the other one if heat or welding on a nut won't work.

olds 307 and 403

What headers are you using? You should have bought the cheap Stainless long tubes. They hang low with your 350 but you are going 455 so they would work great with them.

OLDSter Ralph

You might be able to drill out the broken bolts from below if you have it up on a hoist. Of course, you'll need a right angle drill and short drill bit. Make sure you are centered and straight with the hole. You might be able to have a good "muffler shop" remove the broken bolts. I think your best bet is to have a GOOD muffler shop drill out the broken bolts and put the headers in.

VinMichael

Screw a 3/8 nut on the threads with red Loctite. Or weld the nut on. Then try putting a wrench on the nut taking it off.

oldcutlass

Do both broken bolts have that much thread sticking out? First soak in a goo penetrant. You can heat the area around the bolts with a torch and then screw them right out with vice grips.

Mlunsford33

Thanks alot guys I got it out with a drill bit and I'm using flowtech headers

brownbomber77

Dayum. Good for you. Super lucky. Hope the install goes well. Might wanna take a look at those bushings ya got, too.....ha