I reciently bought a 89 gta. The man I bought it from thought that the head gasket had blown. Upon teardown of the engine I found that the block was cracked in the no.4 cylinder. The block has one piece seal and 4-bolt mains. Is this a hi-pervormance block or are all the one piece blocks 4 bolt. I have concidered sleveing the block,but would rather have a different block. Also what would be a fair price for a one piece rear seal 4-bolt block and 2bolt. If you can please help.

 

used around 250 to 350 for a good one, the higher being a 4 bolt. 4 bolt blocks are cheapest from 8600 gvw and over truck engines. (8600 gvw and over being the 8 lug 3/4 ton trucks and bigger series).i don't remember what year the corvette began using 4 bolt blocks again, but they are nice too, but expensive. a 2 bolt would work fine for pretty much any normal use.

 

4 bolt blocks arent even necessary until you are getting up around 600+ hp. 2 bolts are a dime a dozen.

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85 IROC 350 11:1keith blacks,.555lift erson roller cam,1.5 crane roller rockers,edelbrock intake,holley 4150 750dbl pumper, nitrous oxide,full length heddman headers,true dual exhaust, 11"stall converter, 700R4, 3.73 locker

 

It's not the HP, it's the RPMs you need to watch out for.

Call around to some junk yards looking for a truck or van motor. If you pull it, you can probably find one for around $150-$200. The yards usualy consider them cores so they don't kill you for them. Just bring a list of casting numbers.

 

thanks guys I let my fingers do the walking and found a block out of a 88 3/4 ton work truck for $225 w/the heads. The guy did hot want to part the motor, but it is still not a bad price.

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