305 &350 rods same?
#2
Senior Member
RACING JUNKIE
Join Date: Sep 2007
Posts: 4,137
The crankshafts are the same so the rod journals would match. I believe that all small block chevy rods were 5.7 " long , with the exception of the 400 which was 5.565(i think). Only difference was the old small journal vs the large journals.
Again I could be wrong but this is what I have always thought. I know the cranks are COMPATIBLE cause I have taken a 305 crank out and used it in a 350 with no issues( stock motor)
Again I could be wrong but this is what I have always thought. I know the cranks are COMPATIBLE cause I have taken a 305 crank out and used it in a 350 with no issues( stock motor)
#3
Senior Member
MASTER BUILDER
Join Date: May 2003
Location: Owingsville, Ky
Posts: 157
The 305 rods and the 350 rods have the same dimensions. They are both for the 2.100" crank pin and are 5.700" long center to center, but they don't necessarily weigh the same. There are some versions that are heavier and stronger.
If anything other than a stock rebuild, the rod bolts should be upgraded to give more strength.
Bill
If anything other than a stock rebuild, the rod bolts should be upgraded to give more strength.
Bill
#4
Senior Member
MASTER BUILDER
Join Date: Dec 2005
Location: Rutherfordton North Carolina
Posts: 192
The 305 rods are thinner in the beam and shouldn't be used for a 350. both cranks are 442 castings but they are balanced different and if a 305 crank was used in a 350 without balancing it you would have a very rough running engine.Bill
#6
Junior Member
APPRENTICE
Thread Starter
Join Date: Nov 2007
Location: hickory,n.c.
Posts: 12
305 &350 rods same?
I looked at the rods,and sure nuff the 350 rods are bigger!!! good call.so,it would be best to use the 350 rods? the whole prob is the 350 crank has 2 spun rods and 1 main. so the 2 rods need to be replaced the others look like thay need to be resized.No machine shop around here turns cranks. That is why 305 crank& rods.Just hoping to make things simple.Looks like not going to happen.
#8
Junior Member
APPRENTICE
Thread Starter
Join Date: Nov 2007
Location: hickory,n.c.
Posts: 12
305 &350 rods same?
I live in hickory,N.C. flowers machine shop at napa is doing my other work.They do have 1 they will sale me for $150 with bearings. That looks like the way to go.