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Old 05-29-2003, 03:43 PM   #1 (permalink)
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302 deck height

Hey:

Quick question. Which 302 blocks come with an 8.2" deck height, and which come with an 8.7" deck height?

Thanks--

Gary
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Old 05-29-2003, 04:13 PM   #2 (permalink)
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302 deck height

The early 302 had a 8.206 deck height except for a few years in the early 70's when it went to 8.229.

I'm not familiar with the 8.7 unless it's one of the newer Ford Performance blocks.
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Old 05-29-2003, 04:55 PM   #3 (permalink)
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302 deck height

The only 8.7 I've heard about is the Dart block.
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Old 05-30-2003, 12:24 AM   #4 (permalink)
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302 deck height

8.7 deck blocks have been available from Ford Motorsports for at least 3 years. The additional 1/2 inch allows a little longer stroke AND rods so you don't wind up with the wrist pin in the oil ring. Note however, the selection of intake manifolds is not large.
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Old 05-30-2003, 07:57 AM   #5 (permalink)
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302 deck height

look at this

302 1968-72 with 8.206" deck height
302 1968-72 Stock cast Sterling 272AP*8
302 1968-72 Stock forged 8.7:1 w/63cc TRW Forged L2305F*8
302 1968-72 Turbo/Blower 7.0:1 w/63cc TRW Forged L2441F*8
302 1968-72 Hyper. 8.4:1 w/63cc Keith Black KB192*8
302 1968-72 Hyper. 8.6:1 w/63cc Sterling H273P*8
302 1968-72 1/16-1/16-3/16 9:1 w/63cc TRW Forged L2522F*8
302 1968-72 Performance 9.1:1 w/63cc Keith Black KB115*8
302 1968-72 Performance 9.1:1 w/63cc TRW Forged L2482F*8
302 1968-72 1.5-1.5-4.0 9.5:1 w/63cc TRW Forged L2488F*8
302 1968-72 9.9:1 w/63cc Keith Black KB116*8
302 1968-72 1/16-1/16-1/8 10.6:1 w/63 TRW Forged L2249NF*8
302 1973-76 with 8.229" deck height
302 1973-76 Stock cast Sterling 272AP*8
302 1973-76 Stock forged TRW Forged L2415F*8
302 1973-76 Turbo/Blower 6.7:1 w/63cc TRW Forged L2441F*8
302 1973-76 Hyper. 8.0:1 w/63cc Keith Black KB192*8
302 1973-76 Hyper. 8.2:1 w/63cc Sterling H273P*8
302 1973-76 Street 8.2:1 w/63cc TRW Forged L2305F*8
302 1973-76 Performance 8.7:1 w/63cc Keith Black KB115*8
302 1973-76 Performance 8.7:1 w/63cc TRW Forged L2482F*8
302 1973-76 1.5-1.5-4.0 9.0:1 w/63cc TRW Forged L2488F*8
302 1973-76 9.4:1 w/63cc Keith Black KB116*8
302 1973-76 1/16-1/16-1/8 10:1 w/63cc TRW Forged L2249NF*8
302 1977-up with 8.206" deck height
302 1977-85 Stock exc H.O. 8.4:1 w/69 Sterling 273AP*8
302 1985-87 Stock H.O. 8.9:1 w/69cc TRW Forged L2488F*8
302 1986 Stock car exc H.O.8.9:1 w/69 Sterling 517P*8
302 1986 Stock truck 8.4:1 w/69cc Sterling 273AP*8
302 1987-91 Stock exc H.O. 8.9:1 w/69 Sterling 517P*8
302 1992-94 Stock truck 8.9:1 w/69cc Sterling 517P*8
302 1977-up Turbo/Blower 6.7:1 w/69cc TRW Forged L2441F*8
302 1977-up Hyper. 8.0:1 w/69cc Keith Black KB192*8
302 1977-up Hyper. 8.1:1 w/69cc Sterling H273P*8
302 1977-up Street 8.1:1 w/69cc TRW Forged L2305F*8
302 1977-up 1/16-1/16-3/16 8.4:1 w/69 TRW Forged L2522F*8
302 1977-up Performance 8.5:1 w/69cc Keith Black KB115*8
302 1977-up Performance 8.6:1 w/69cc TRW Forged L2482F*8
302 1977-up 9.1:1 w/69cc Keith Black KB116*8
302 1977-up 1/16-1/16-1/8 9.8:1 w/69 TRW Forged L2249NF*8
302 with Boss or Cleveland heads and 8.206" deck height
302 Boss 1969 10.7:1 w/63cc TRW Forged L2324F*8
302 Boss 1970 11.4:1 w/58cc TRW Forged L2324F*8
302 2V Cleveland 9.0:1 w/76.2cc Sterling H557P*8
351W 1969-72 with 9.480" deck height
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Old 05-30-2003, 08:05 PM   #6 (permalink)
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302 deck height

Ok with an 8.229" deck height how much do you lose with...say...a 10.5to1 piston?
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Old 05-30-2003, 10:54 PM   #7 (permalink)
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302 deck height

Nothing! The point is to build the short block to suit the block that you base the engine on.

If you try to use stock dimension parts (rods, pistions), crank is another issue, on a tall deck block you have made a mistake from the start. The piston/rod assymbly will be too far down in hole...if you deck the block to bring the pistons up, then you have wasted the reason you got the tall deck block in the first place. To build an engine using a tall deck block you need to spec out the geometry (rod length, pin heigth, etc) before swapping, mixing and matching parts. The best engines are built on paper, before bolting parts together.
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Old 05-30-2003, 11:00 PM   #8 (permalink)
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302 deck height

use off the shelf 302 pistons, stock 302 crank, and 5.155 rods. Brings the piston to 0 deck, at worst case .010 out, but no big deal. Good luck
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Old 12-03-2007, 04:06 PM   #9 (permalink)
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I picked up my Sterling 517P at DieselGalaxy. Here's the link: Sterling 517P, Piston Ford V8 302 :: STERLING :: Manufacturers 2 :: DieselGalaxy.com
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