I'm gettin a 73 400 for free. Do you guys think i should build that? Or should I spend the money and get an older block? Do you guys have any build up ideas or models for a 400?
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The block doesnt matter much , the power is in the heads. What heads does it have? You want a nice, early 67-70 (maybe 71), big valve, high compression (not too high), head. If you post the code on the center exhaust port, I can tell you what the heads are rated at.96 WS6 Formula: Ram Air, 383 Stroker, Ported LT4 Heads and Manifold, 1.6 Crane Rollers, 58MM T.B., AS&M Headers, Borla Exhaust, Meziere Elec. H2O Pump, Canton Deep Sump Oil Pan, 100 HP OF TNT N2O!! , T56 Conversion w/ Pro 5.0 shifter, SPEC Stage 3 Clutch, Hotchkiss Subframe Conn., Lakewood Adj. Panhard Bar, Spohn Adj. LCA's, BMR Adj. T.A., Custom 12 bolt w/ 3:73's, Moser Axles, Eaton Posi, Moser Girdle
11.6 @ 123mph (1.6 60' - getting there
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ok well then im gonna use the 400 and get older heads... but i want a lower compression cause i wanna turbo it... found a site with a guy who was in HPP Sept 03 who turbod a 455 on his 79 and has a manual he made and all.. plus my bros a distributor for turbonetics...
so anyone want turbos lemme know.
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Go with 6X heads then. Low compression and flow pretty good. They can be ported to flow excellent. Good luck with that.96 WS6 Formula: Ram Air, 383 Stroker, Ported LT4 Heads and Manifold, 1.6 Crane Rollers, 58MM T.B., AS&M Headers, Borla Exhaust, Meziere Elec. H2O Pump, Canton Deep Sump Oil Pan, 100 HP OF TNT N2O!! , T56 Conversion w/ Pro 5.0 shifter, SPEC Stage 3 Clutch, Hotchkiss Subframe Conn., Lakewood Adj. Panhard Bar, Spohn Adj. LCA's, BMR Adj. T.A., Custom 12 bolt w/ 3:73's, Moser Axles, Eaton Posi, Moser Girdle
11.6 @ 123mph (1.6 60' - getting there )
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thanx. which 6X does it matter? 6X-4 or 6X-8?Comment
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Just 6x. Im not too sure about those others. Too be honest ive never heard heard of a 6x-4 or 6x-8. I know 4x. You want just 6x.96 WS6 Formula: Ram Air, 383 Stroker, Ported LT4 Heads and Manifold, 1.6 Crane Rollers, 58MM T.B., AS&M Headers, Borla Exhaust, Meziere Elec. H2O Pump, Canton Deep Sump Oil Pan, 100 HP OF TNT N2O!! , T56 Conversion w/ Pro 5.0 shifter, SPEC Stage 3 Clutch, Hotchkiss Subframe Conn., Lakewood Adj. Panhard Bar, Spohn Adj. LCA's, BMR Adj. T.A., Custom 12 bolt w/ 3:73's, Moser Axles, Eaton Posi, Moser Girdle
11.6 @ 123mph (1.6 60' - getting there )
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Go with the 6X-4. They are the heads on the '77-'79 W-72 engine and they flow very well. They yield 8.2:1 (to 8.5:1) compression. The chambers are around 94cc while the 6X(-8) heads are over 100cc and they are in the 7s for compression. Sources very on the compression and chamber size so these are ball-park figures. Definitely, don't use any of the older high compression heads.'77 K5 rock-crawler project
'79 T/A: WS6, 400 4sp, 40K miles; Completely stock and original
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Yup, mark nailed it. 8.5:1 is about as high as I would go on that motor with a turbo. N/A you would be better off with the older heads at 10:1.Originally posted by markd79ta
Go with the 6X-4. They are the heads on the '77-'79 W-72 engine and they flow very well. They yield 8.2:1 (to 8.5:1) compression. The chambers are around 94cc while the 6X(-8) heads are over 100cc and they are in the 7s for compression. Sources very on the compression and chamber size so these are ball-park figures. Definitely, don't use any of the older high compression heads.96 WS6 Formula: Ram Air, 383 Stroker, Ported LT4 Heads and Manifold, 1.6 Crane Rollers, 58MM T.B., AS&M Headers, Borla Exhaust, Meziere Elec. H2O Pump, Canton Deep Sump Oil Pan, 100 HP OF TNT N2O!! , T56 Conversion w/ Pro 5.0 shifter, SPEC Stage 3 Clutch, Hotchkiss Subframe Conn., Lakewood Adj. Panhard Bar, Spohn Adj. LCA's, BMR Adj. T.A., Custom 12 bolt w/ 3:73's, Moser Axles, Eaton Posi, Moser Girdle
11.6 @ 123mph (1.6 60' - getting there )
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