85 crate motor in an 86 blazer? flywheel/harmonic balancer same?

[xtrmjoe]

I priced out a crate motor for my 86 and they wanted over 2000. But the one for an 85 is only 1400. I know the rear main seals are different. So do just get a new flywheel for an 85 to? and is the harmonic balancer the same as well? Anything else I need to look out for?
I searched a lot and did not find exactly what I was looking for 86 is a weird year new rear main seal but still carb.

 

[blazin83]

if the crank is the same it should bolt up??

 

[4X4HIGH]

The 85-86 engine has a neutral balance harmonic balancer but the 1986 uses a different flexplate with a smaller bolt circle and it is external balanced unlike the 1985 and earlier SBC's which are internal balanced.

 

[xtrmjoe]

I priced out a crate motor for my 86 and they wanted over 2000. But the one for an 85 is only 1400. I know the rear main seals are different. So do just get a new flywheel for an 85 to? and is the harmonic balancer the same as well? Anything else I need to look out for?
I searched a lot and did not find exactly what I was looking for 86 is a weird year new rear main seal but still carb.

Any engine experts have a difinitive answer I am buying this thing tomorrow?

 

[4X4HIGH]

Any engine experts have a difinitive answer I am buying this thing tomorrow?

If you look at my profile you'll find out i am an engine expert with 20 years professional experience.

 

[xtrmjoe]

If you look at my profile you'll find out i am an engine expert with 20 years professional experience.

No offence I was just looking for a 2nd opinion to verify befeore I go spend a boat load of cash.

Thanks for the advice!
Iam getting the engine in the AM it is going to be a good weekend