ext balanced 305?

greg fulk · 04-01-2009, 07:11 PM

Hey guys I have an 86 305 that is ext. balanced... but it was a stick I'm now going to use an auto on it. My question is I have a 400 sb (i don't know what i'm going to do with it if anythng) can i use the flexplate off it ? Would I also have to use the blancer if I did do this? Thanks 4 the help

Tom keedle · 04-01-2009, 07:29 PM

Quote:

Originally Posted by greg fulk

Hey guys I have an 86 305 that is ext. balanced... but it was a stick I'm now going to use an auto on it. My question is I have a 400 sb (i don't know what i'm going to do with it if anythng) can i use the flexplate off it ? Would I also have to use the blancer if I did do this? Thanks 4 the help

nope, don't use the 400 stuff, it'll shake big time
you'll need a 305 'wheel and they're cheap enogh...
the 1 piece sbc's are only balanced at the flywheel, the balancer is neutral balanced like a 350 (not a 400)

BillK · 04-01-2009, 07:52 PM

Greg,
The 400 flexplate is a different bolt pattern than your 305 with the one pc rear main seal crankshaft. You will need to get an 86 or newer 350/305 flexplate. If it does not need to be an SFI wheel, they are fairly cheap.

greg fulk · 04-01-2009, 08:30 PM

Thanks guys!!

04-01-2009, 07:11 PM	#1
greg fulk VIP Member Join Date: Jan 2003 Location: jackson Posts: 1,165 Likes: 0 Liked 5 Times in 3 Posts	ext balanced 305? Hey guys I have an 86 305 that is ext. balanced... but it was a stick I'm now going to use an auto on it. My question is I have a 400 sb (i don't know what i'm going to do with it if anythng) can i use the flexplate off it ? Would I also have to use the blancer if I did do this? Thanks 4 the help __________________ Greg Fulk 308 308X P/SA "ALL AMERICAN"

04-01-2009, 07:52 PM	#3
BillK Member Join Date: Nov 2005 Location: Waldorf Md Posts: 222 Likes: 10 Liked 26 Times in 15 Posts	Re: ext balanced 305? Greg, The 400 flexplate is a different bolt pattern than your 305 with the one pc rear main seal crankshaft. You will need to get an 86 or newer 350/305 flexplate. If it does not need to be an SFI wheel, they are fairly cheap. __________________ Bill Koustenis

04-01-2009, 08:30 PM	#4
greg fulk VIP Member Join Date: Jan 2003 Location: jackson Posts: 1,165 Likes: 0 Liked 5 Times in 3 Posts	Re: ext balanced 305? Thanks guys!! __________________ Greg Fulk 308 308X P/SA "ALL AMERICAN" Last edited by greg fulk; 04-02-2009 at 03:50 PM.