Visual difference in 302 vs 347?

What were the list numbers ? There's far more than one 4160 Holley

 

"80457-2" and under that was "1509".

 

That's a vacuum sec 600.

 

Okay, thanks. This is the correct rebuild kit then?

http://www.ebay.com/itm/Holley-Carb-Kit-Vacuum-Sec-600-750cfm-4160-4BBL-37-1542-/150527816438

 

yes, thats the one

 

Awesome, thanks!

 

Got the motor out today. I was finally able to get an engine code off of it. If I decoded it right, it is a '74 off of a Maverick.

D4DE-6015-BA

and under that was:

6c2

 

6C2 = 1976, March, 2nd day...

That's should be one of the tall 8.229" deck blocks, unfortunately not a desirable feature, they kill close to a point of compression...

 

Ahh, that must be why they put the 68 heads on it then.

 

Tall deck ? All .020 of the extra material can be easily milled away by your local machineshop. That should be done anyway to true up the decks. .020 does not add a full point off the compression. The quarter inch deep dish in the stock pistons those years did that and more. .020 is half a head gasket thickness. The block itself is no different in structure than the Mex blocks. The only difference is the main caps. All the 302 blocks from 68 to 79 have the same amount of iron in them, mex blocks included.

 

That's the engineering number for an engine block. It in no way indicates what vehicle it was used in in production.

 

nipping .025 would be about a half point of compression or slightly more.

Doubtful that they even make a tall enough piston for a zero deck tall block like that and using one of the taller flat top pistons available would likely still be required to zero deck it even after its decked though.. unless you want to cut the block even more and work around a shorter piston.

 

My first 347 I used a D4 block, had to have .025" cut off the deck to zero the pistons. For that stroke and bore it made 1/2 point difference in the CR.

 

Ahh, okay. As long as I have something to go by now. Getting ready to start cleaning it up and disassembling. From just pulling it out yesterday, I seen it needed an oil pan gasket, time cover gasket, and I'm sure I'll find more things as I get further into it.

 

Take a look at this. Does it spell trouble?







Found it after I took out the distributor. Any ideas on what happened here? I bet there is a lot of metal in the oil pan.