Big block fan shroud
 

looking for some measurements if anyone has a 454 fan shroud. trying to see what the opening for the fan looks like. I swapped an 85 454 bb radiator in my 67 with 5.3 ls motor. trying to see if I can use the bb shroud

thanks in advance!

Re: Big block fan shroud
 

I can get you some pics of the shroud/top plate set-up I purchased for my dually but couldn't use. it's apparently for the 81-87 style BB radiator set-ups because it's different vs. my '89 so I didn't use it.

Re: Big block fan shroud
 

sure that works. when you say top plate..is this a 2 piece shroud?

heres how i had to do my rad mounts since this bb radiator was a little taller than my 67 core support

Re: Big block fan shroud
 

this is the shroud listed on ebay for a mid 80's bb that im hoping would work. it looks very shallow and the opening for the fan looks bigger than the small block shrouds

Re: Big block fan shroud
 

Here's some images I grabbed @ lunch. There is an additional metal 'top-plate' that attaches to this 2pc assembly. In the last 2 pics, you can see where they're riveted together & there's a p/n on one side.

I got the 3pcs through LMC but they're not like the OE stuff under the hood for my 89 Squarebody dually. I just cleaned the OE stuff up as best I could & went w/it.

Re: Big block fan shroud
 

The top metal plate is this style:

Re: Big block fan shroud
 

hmm ya I don't understand the lmc one you have. it looks nothing like the one I showed, unless there are different versions? what's your stock one look like?

Re: Big block fan shroud
 

nobody besides scoti has a big block mid 80s truck?

Re: Big block fan shroud
 

give me some time, it's only 7:00 am.
i will take a pic of the factory shroud on my factory 454 '85 K30

Re: Big block fan shroud
 

no problem at all. I haven't owned a square body since I was 17 and it sure as hell wasn't a big block lol.

can you also measure the top mounting holes? I'm wondering if they are close to my modified hold downs

Re: Big block fan shroud
 

i noticed the drivers ear on my shroud is missing a chunk...all stock except for the aluminum rad-which was a direct bolt-in
Attachment 2165610Attachment 2165611Attachment 2165612Attachment 2165613Attachment 2165614

Re: Big block fan shroud
 

hmm that one doesnt look like the one i posted or scoti's lol. i guess there more shrouds available than i thought. could you measure the top 2 outer mounting holes?

Re: Big block fan shroud
 

the rad mounts are at 1", 2", then 28 1/2" and 30 1/2". maybe allow a 1/8 for my unsteady hand when measuring...
Attachment 2165620Attachment 2165621

the shroud mounts are at 1", the middle one is at 13 1/4, and the last one is at 26", again, give or take a hair on my measurements
Attachment 2165622Attachment 2165623

Re: Big block fan shroud
 

so from the driver side shroud mounting hole to the passenger side shroud mounting hole is roughly 25"? mine is 29". why is this so hard! lol. im guessing the square body locations arent as close to the 67-72 as i thought. mine are a little off though since i had to cut and raise the stock rad mounts...they also move in/out a little so i could line up the part the grab on with the cushions.

Re: Big block fan shroud
 

sorry, my mistake, when i said the first bolt is at 1", that was from the edge of the shroud, the distance between the 2 shroud bolt holes is 26"

Re: Big block fan shroud
 

no biggie...still way off. im thinking the best option is to try and make my stock shroud fit. the fan fits in the hole...but just barely....and it needs to be dropped maybe an inch? im thinking no matter which bb fan shroud i find, it will have the mounting measurements you listed, or close to it, which be at least a few inches off.

oh well...we tried. thanks you 2 for your help :D