can you use a 305 crank in a 350 ???

[chip graves]

i have a 350 with a bad crank and i have a few 305's the size's mach but what blancer do i use the 350 or the 305 i am going to run 283 heads(i think or i will put my 265 heads on it ) with a .510 lift cam  i just need to know if the crank out of the 305 will work out and what blancer do i use thank for the help guy    chip

[betterbeaters]

call  482 4900  its muscle motors in lansing they can help ya!

[RIP_K52007]

prolly use the balancer that goes to that crank... should beable to use the 305 crank, the only dif in the 305 n 350 is the bore size is what ive always been told...

[chip graves]

ya i know it is the bore that is diff every thing else shows as if it will work i am just not sure if i use the 350 blancer bc of the bore size or if i use the 305 bc thats what crank it is

[Eroq]

same cranks were used for 305s and 350s....

use 305 balancer with the 305 crank

[Eroq]

305 timing mark is at 12oclock opposted to 2 oclock or so...

[chip graves]

ok now on a 1994 350 what heads are on them ??

[84Chevy]

why fawk with 305 crank 350 cranks are dime a dozen

[chip graves]

bc i have 2 305's sitting here and i dont have that much money i am going to be pressed on this any way

[RIP_K52007]

just talked to someone whos been workin on sbc's for longer than i been alive.. he said 305 and 350 the same, just use balancer that came with the engine and timing cover that came with it and it will be fine.

[Kodiak450r]

ok now on a 1994 350 what heads are on them ??

vortec heads set up for TBI, originally....

center bolt heads are vortecs, just in 96 when they changed fuel delivery they transferred the head name to the engine itself

sorry to say but your wrong. there are diffrences between 87-95 pre-vortec heads and 96-2000 true vortec heads. not just the mounting for the intake. the intake ports are diffrent volumes, 87-95 have a big ramp cast into it for a swirling effect which is y 87-95 heads are reffered to as swirl port heads. all 87-95 TBI cars and trucks has those style heads. vortec heads don't have that ramp which is y they outflow swirlports by alot.

as for the crankshaft issue. you can't run a 305 crank in a 350 unless you balance the entire rotating assembly from balancer to flywheel/flexplate as 87-up are externally balanced engines. the engine will be far enough off in balance to give you a destructive vibration. the harmonic balancer will not be able to correct it

[2000silverado]

ok now on a 1994 350 what heads are on them ??

vortec heads set up for TBI, originally....

center bolt heads are vortecs, just in 96 when they changed fuel delivery they transferred the head name to the engine itself

sorry to say but your wrong. there are diffrences between 87-95 pre-vortec heads and 96-2000 true vortec heads. not just the mounting for the intake. the intake ports are diffrent volumes, 87-95 have a big ramp cast into it for a swirling effect which is y 87-95 heads are reffered to as swirl port heads. all 87-95 TBI cars and trucks has those style heads. vortec heads don't have that ramp which is y they outflow swirlports by alot.

as for the crankshaft issue. you can't run a 305 crank in a 350 unless you balance the entire rotating assembly from balancer to flywheel/flexplate as 87-up are externally balanced engines. the engine will be far enough off in balance to give you a destructive vibration. the harmonic balancer will not be able to correct it

you will think there is an earthquake going on if you don't balance that crank and just slap it in.

[J.C.]

i believe also the vortec heads dont have the water passage in between the intake ports too