Id Engine & Head
Joined: Mar 2000
Posts: 43,187
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
With casting #'s in hand, www.mortec.com .
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No bolt on problems, but you will have issues with the smaller valves in the 305 head. That and the 305 head has 58cc chambers. It will give a good bump in compression, may cause problems unless you get it dialed in just right.
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
3rd gen 305 valves were 1.84" intake and 1.50" exhaust. Some previous versions were smaller.
3rd gen 350 valves were 1.94" and 1.50". Over the years, 350's have had 1.72" to 2.02" intakes, and up to 1.60" exhaust from the factory.
3rd gen 350 valves were 1.94" and 1.50". Over the years, 350's have had 1.72" to 2.02" intakes, and up to 1.60" exhaust from the factory.
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Junior Member
Joined: Jan 2003
Posts: 78
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From: Phoenix Arizona
Car: 79 ELKIE
Engine: TPI 305
Transmission: 700R4
not to much of a differance in the intake would that make least ponies and toruqe? if so I might have to break into my piggy bank and spring for 350 ? I have other head lying around what the best way to seen if they are for 350s
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Originally posted by five7kid
With casting #'s in hand, www.mortec.com .
With casting #'s in hand, www.mortec.com .
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Aug 23, 2015 11:49 AM