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Old 03-02-2006, 01:01 AM   #1
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Default 429 Thunderjet

A guy told me today that the 429 ThunderJet in our 1970 Thunderbird is a TRUE
legend engine and quite hard to find these days...........any truth to that ?!

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Old 03-02-2006, 12:23 PM   #2
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Default RE: 429 Thunderjet

It's my understanding that are just the standard engine for those big cars for Ford and Mercury. People would rather if they had a choice go with a 429 Cobra Jet, 429 Super Cobra Jet, or a 429 Boss before they got a Thunderjet. Here are the specs

429 (Thunderjet)
two-bolt main bearing cap

Bore and Stroke 4.36x3.59

cast-iron crankshaft

forged-steel connecting rods with 3/8 inch rod bolts

cast-aluminum pistons

hydraulic lifter camshaft

2.08 inch/1.66 inch intake/exhaust valves

non-adjustable rocker arms

cast-iron intake manifold

4 barrel or 2 barrel carburator

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