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July 4th, 2008, 08:22 PM
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4290 Turbo Block?
I was offered a Buick V6, block # 25514290 for free out of some guys back yard. I ran that casting number, and most sites listed that block as a turbo block. Now, this engine didnt look like a turbo engine as it had a 2bbl dualjet intake and carb. So does this mean a turbo block with N/A stuff bolted on or a regular low performance motor?
If this turns out to be the turbo motor will it contain a rolled fillet crank? I just ask because its a long drive and a real pain in the rear to pick it up, so I want to know if its worth the trouble! Thanks A.j.
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Almost Complete 79 Buick LUV, 6-71 Supercharged 274ci Stage 2.     
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July 4th, 2008, 10:13 PM
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Sounds like the numbers to a 79 carbed turbo 3.8, dunno what its worth or if its any good, someone outta know!
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New forged stroker in the works for sometime-ish in 08-Race ported GN1's-GN1 intake-Precision PT71GTQ 4 bolt-dual nozzle alky-RJC megacooler-Steel caps-Girdle-218* Roller cam-Maftpro-83lb injectors and some other goodies.....  1986 Grand National-all the goodies to make it work.......  Visit my Myspace page, always looking for Turbo Buick friends... www.myspace.com/rysfly
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July 5th, 2008, 03:59 AM
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From what I see it’s a 1979 turbo block I'd pick it up just to snag the crankshaft. Should have the rolled fillet crank in it but that's about all you'd want.
Buick V6 History
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Scott Lambert 87 GN 32k Original Owner GT6131e, Crane Billet Roller 212/210, 3" SS THDP, 9" Art Carr, 57lb inj, 22 Row Thunder Fab, Hooker Cat Back, Hot wired Fuel pump, Adj fuel reg, Bell Mouthed TB, Stock location K+N w/ Postons base lid, Scanmaster, Ported Big Valve Heads- All Studed 86 T-Type Now a Parts Car  87 Turbo T Astro-Roof Chrome Trim 87 Turbo T Solid Roof White w/ Blk Trim-Mama's New Toy
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July 17th, 2008, 10:37 AM
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got the motor home, looks decent inside... turbo crank and 2 dot rods. would make a nice base for a girlfriends ride.
Does anybody see this block as worth building? aiming for a 500HP goal with say a girdle and some aftermarket rods/pistons? I remember someone saying the head bolts were an issue due to the threads being fully tapped .... can anyone shed some light on this? Production blocks are still new to me! Thanks A.j.
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Almost Complete 79 Buick LUV, 6-71 Supercharged 274ci Stage 2.
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