Value of a 4 bolt 427/454 block - Team Camaro Tech
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post #1 of 15 (permalink) Old Mar 30th, 03, 12:21 PM Thread Starter
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Question

Apparently these blocks are "new". They are 4bolt mains and have an unfinished bore of 4.20". The seller claims the blocks are suitable for marine use and have think cylinder walls suitable for racing.
What do you think this setup would be worth? I still would have to have the block honed and all...
jeff+cindy
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post #2 of 15 (permalink) Old Mar 30th, 03, 01:54 PM
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Jeff,
Make sure this is not a Tall Deck 427 block. If it is an unfinished bore, it almost sounds like a Bow-Tie block, it would still have to be bored to 4.250" bore size. Without some more details, such as casting numbers, its hard to say if they are a worthwhile purchase or not.

Bill Koustenis
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post #3 of 15 (permalink) Old Mar 30th, 03, 02:12 PM
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Listen to Bill; apparently there are a bunch of new tall blocks that have shown up at a good price.
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post #4 of 15 (permalink) Old Mar 30th, 03, 04:32 PM
 
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OK, lets do it this way!!!

What does the guy want for one of them??? pdq67



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post #5 of 15 (permalink) Old Mar 31st, 03, 10:13 AM Thread Starter
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What does it mean for me if it is a tall deck? Does it mean I can't put normal aftermarket parts on? It is an unfinished bore of 4.20" that would be one trip to the machine shop for x amount of $$$. The shop says they have a bunch of them and they want $450 for um.
what do you guys think?
jeff
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post #6 of 15 (permalink) Old Mar 31st, 03, 11:13 AM Thread Starter
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He says it is a
"New 454/427 Mark IV, 4 Bolt Big Block"
Does this ring any bells? Also, he says it is a GM cast block, "it was cast 92".
I have found some info that kinda says it is for 90 or so and up??? This means I can't use it huh.
Jeff
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post #7 of 15 (permalink) Old Mar 31st, 03, 03:31 PM
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Jeff,
Ask him for the casting number of the block. It will be a 7 or 8 digit number, something like "1704589" etc. If he cannot give you this number then he is hiding something. I sounds like it might be a marine block, or a factory replacement, but I have never heard of them coming in that bore size. Get the casting number and I can tell you exactly what it is.

Bill Koustenis
Owner
Advanced Automotive Machine
Waldorf Md
1971 Chevelle "Heavy Chevy" original owner


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post #8 of 15 (permalink) Old Mar 31st, 03, 05:22 PM Thread Starter
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Still waiting on him for the casting #. It IS a tall deck block (10.20") he said.
Jeff
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post #9 of 15 (permalink) Old Apr 1st, 03, 04:53 AM Thread Starter
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Here is the casting #.
10069284
Typing this in google I come up with 4bolt mains unknown years Mark IV 427 tall deck.
jeff
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post #10 of 15 (permalink) Old Apr 1st, 03, 08:14 AM
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Jeff, there's a few items that are specific to the tall blocks. You'll need spacers to run a standard big block intake manifold. The dist. is longer although one of the adjustable collar dists should work (I think). Stock the pistons and rods are different but you can mix and match to build a big engine with the extra deck height. A disadvantage is that hood clearance becomes even more of an issue. I wouldn't do it in a first gen unless you're willing to run an aftermarket hood with more clearance. There's enough clearance issues with a standard deck. Also headers will likely be custom due to the higher port with the tall deck.
I believe Lemon's has a header that will work at about $800/set.
Jody


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post #11 of 15 (permalink) Old Apr 1st, 03, 09:49 AM Thread Starter
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Thanks guys, you've all come through in the clutch as usual. One other thing... since it is a new cast can't I just have the machine shop deck the block to normal BBC hieght?
jeff
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post #12 of 15 (permalink) Old Apr 1st, 03, 11:32 AM
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No, unfortunately you're talking nearly 1/2" in deck height difference! Can't remove that much.

Jody


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post #13 of 15 (permalink) Old Apr 1st, 03, 01:33 PM Thread Starter
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okay...
Guess I can't afford to buy this engine in the long run . Thanks for all the help guys.
jeff
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post #14 of 15 (permalink) Old Apr 2nd, 03, 12:00 PM
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I would be interested. What is his info? (If you dont mind)anyone else maybe we can work out a group purchase.

67 Blown Alcohol Camaro "The Combat Rat" 8-71 and E-85/71 BB SS Chevelle "cheap street" (clone) 12.871 @ 107.59 w/1.915 60' and spinning /2002 35th anniv SS Z28 conv./74 454 El Camino .
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post #15 of 15 (permalink) Old Apr 23rd, 03, 07:17 AM Thread Starter
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Milan,
Sorry about not getting that information to you. I forgot about this post. I lost the info.
I'll keep an eye out for it.
jeff
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