Prepping a 302 Block for a 347

Monster Notch · 02-02-2004, 12:02 PM

Hi,

I am building a 347. What needs to be done other than punch the block to prep it? I will get it cleaned and checked but is there any machining required to clear the crank?

Do you know how much I would be looking at in terms of cost to prep the block? (Please specify CAN or US$)

Thank you

302 LX Eric · 02-02-2004, 02:10 PM

Here's a breakdown of machine costs for my 331 that I built nearly 2 years ago:

$78 - Engine Hot Tank
$79 - Engine Hone
$112 - Engine Overbore (.030")
$170 - Spin balance (28oz imbalance) crank, fly, damper

That's $439 US.

Hope this helps.
E

302 LX Eric · 02-02-2004, 02:11 PM

Also, you will have clearance issues with the rods and bottom of the cylinders. Notching will be required.

E

Monster Notch · 02-02-2004, 02:39 PM

Thank you very much!

That's exactly what I wanted to know! I will be using a very reputable shop to prep the block so they will know what to do. I will provide the rotating assembly with the block for them to balance and measure pistons and check for clearances.

Thank you!

Marc

02-02-2004, 12:02 PM	#1
Monster Notch Registered Member Join Date: Jan 2004 Posts: 2	Prepping a 302 Block for a 347 Hi, I am building a 347. What needs to be done other than punch the block to prep it? I will get it cleaned and checked but is there any machining required to clear the crank? Do you know how much I would be looking at in terms of cost to prep the block? (Please specify CAN or US$) Thank you

02-02-2004, 02:10 PM	#2
302 LX Eric or '331 LX Eric' Join Date: Jan 1999 Location: Columbus, Ohio Posts: 2,142	Here's a breakdown of machine costs for my 331 that I built nearly 2 years ago: $78 - Engine Hot Tank $79 - Engine Hone $112 - Engine Overbore (.030") $170 - Spin balance (28oz imbalance) crank, fly, damper That's $439 US. Hope this helps. E __________________ 1991 5.0 LX Coupe - 40,750 miles 331 cu. in. / Tremec 3550 / BFG Drag Radials 12.22 @ 114.31 mph - w/1.89 60'

02-02-2004, 02:11 PM	#3
302 LX Eric or '331 LX Eric' Join Date: Jan 1999 Location: Columbus, Ohio Posts: 2,142	Also, you will have clearance issues with the rods and bottom of the cylinders. Notching will be required. E __________________ 1991 5.0 LX Coupe - 40,750 miles 331 cu. in. / Tremec 3550 / BFG Drag Radials 12.22 @ 114.31 mph - w/1.89 60'

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02-02-2004, 02:39 PM	#4
Monster Notch Registered Member Join Date: Jan 2004 Posts: 2	Thank you very much! That's exactly what I wanted to know! I will be using a very reputable shop to prep the block so they will know what to do. I will provide the rotating assembly with the block for them to balance and measure pistons and check for clearances. Thank you! Marc