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| Non Pontiac Motors in Pontiacs includes factory 403,305,350 Chevy, Buick V6, Also Pontiac Motors in non-Pontiacs! |
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#1
01-09-2003, 07:27 AM
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I am about to remove a 1978 305 chevy (170hptruck motor yech
 !) w/300 trans from my 67 bird and install a 400pontiac 425hp w/th400 transmission. I am wondering if there are going to be any nasty suprises on the engine mounts or transmission crossmember. the rear appears to be a stock 10 bolt posi and i have a short shaft 400 xmission. please advise 
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No GTO doesn't mean garbage truck option! |
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#2
01-09-2003, 07:27 AM
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I am about to remove a 1978 305 chevy (170hptruck motor yech
!) w/300 trans from my 67 bird and install a 400pontiac 425hp w/th400 transmission. I am wondering if there are going to be any nasty suprises on the engine mounts or transmission crossmember. the rear appears to be a stock 10 bolt posi and i have a short shaft 400 xmission. please advise
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No GTO doesn't mean garbage truck option! |
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#3
01-09-2003, 10:04 AM
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I just did this switch. You will need Pontiac motor mounts and mount brackets(any 67-69 F-bird motor mount brackets will work), a TH400 crossmember (found on e-bay for about $50), TH400 driveshaft slip yoke, and have the driveshaft shortened about 1/2-3/4 if an inch.
69 Firebird, FINALLY installed the Pontiac 469. 01 Red and pewter GMC Ext Cab SIERRA SLT 4x4 02 Maple Red (maroon) LS1 Trans Am
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69 Firebird, .060 over 455, UD solid roller 254/262 @ .050, Scorpion rockers, home ported 6X-4 heads, Holley 850 DP (bone stock), Holley SD intake, with Summit 3 inch x-pipe and goerlich Xlerator mufflers. 12.27 @ 115mph. 02 Midnight Blue LS1 Ram Air Trans Am WS6 (440 rwhp) http://firstgenfirebird.org/show/closeup.mv?CarID=642 |
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