Swap stock 305 with a 350 1986 Grand Prix

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RDR89

Apprentice
Jul 25, 2020
74
23
8
Manassas, VA
What am I looking at for doing this? Short block or long block 350? Do the accessories (alternator, distributer, AC) from the 305 bolt on to the 350 from the 305? Would the motor mounts match up? Will the transmission from the 305 mate up to the 350?
 

pagrunt

Geezer
Sep 14, 2014
9,155
15,321
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Elderton, Pa
Only difference between a 305 & 350 is the bore size. Everything transfers over, all you do is pull the 305, drop in the 350, drive away.
 
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565bbchevy

Geezer
Aug 8, 2011
9,611
12,668
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Michigan
As long as the 350 SBC doesn't have some older heads swapped on it that didn't have all of the accessory holes it should be a direct swap.
 

565bbchevy

Geezer
Aug 8, 2011
9,611
12,668
113
Michigan
Does short or long block matter, for the drive shaft for instance?
The engine swap has no effect on the driveshaft as long as you are using the same trans.
 
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