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Do I have a chevy or pontiac 305??

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Old Jan 14, 2006 | 07:34 AM
  #1  
johndukewayne's Avatar
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Do I have a chevy or pontiac 305??

I have a 1983 Firebird trans am with a 305 crossfire and automatic tranny. Is the motor a chevy or pontiac motor? Need to know if my crate chevy 383 will bolt up correctly.
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Old Jan 14, 2006 | 08:14 AM
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Randy82WS7's Avatar
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From: 62656
Car: 1991 S10 pickup 2700lbs
Engine: 4.3L Z TBI
Transmission: 700R4
Axle/Gears: 3.08 7.625"
all 82-up are chevy powered

pontiac did not make a 305 anyways


383 crate is same bellhousing as 305 yes

happy swapping
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Old Jan 16, 2006 | 09:39 PM
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joshnryandad1's Avatar
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From: northeast, oklahoma
Car: 1991 camaro rs
Engine: 3.1
correct me if i'm wrong but a chevy 5.0 is a 305 and a 5.0 pontiac is a 301. i have an 81' pontiac bonneville that has a 301. good engine though
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Old Jan 16, 2006 | 09:55 PM
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From: northeast, oklahoma
Car: 1991 camaro rs
Engine: 3.1
https://www.thirdgen.org/newdesign/tech/techdb.shtml should have given you this first! sorry it says that in 83 there was a 305!! shows it was used in the z28 also. so... you shouldn't have trouble if you put a chevy v8 in!

Last edited by joshnryandad1; Jan 16, 2006 at 10:13 PM.
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