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Urgent- anyone have a SBF block they can measure for my engine cradle build?

gsxrken

Member
Hey all- building an engine cradle for a 351w I’m picking up next week and I’m stuck.
I’ve found some references to most of the dimensions but I need to know the distance between the motor Mount bolts (across the engine, not between the two holes on a single Mount). When I confirm that I can determine where to weld in my uprights.
Here’s a pic of what I’m duplicating... thanks!
B4A560E5-6B28-426E-9067-ACF92425E2D7.jpeg
 

B67FSTB

The NorCal dude from Belgium
I will look into that. Have a 302 block laying around somewhere.
So , distance between the mounting holes left to right for the motormounts. Right?

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B67FSTB

The NorCal dude from Belgium
Something I made :



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Last edited:

B67FSTB

The NorCal dude from Belgium
Did come up with 333 mm center to center.
You do have to convert to inch I guess

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B67FSTB

The NorCal dude from Belgium
Just have to second those measurement by someone else too.

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gsxrken

Member
Done! Well nothings ever done-done. I need to check it at the machine shop when we pick up the engine. Realized at the last minute the canton 7qt oil pan kicks out and would hit my uprights if I didn’t set them back far enough.
I figure on placing it on the engine mounts and drill the rear uprights on-site to attach to the widest bell housing bolt holes.
I may or may not weld on diagonals to brace the uprights... right now I need the minor amount of play I can get to make sure all the bolt holes line up. Then I’ll assess whether it needs them or not.
8392A9E9-951F-4E7D-94F6-764767D3875B.jpeg
 

B67FSTB

The NorCal dude from Belgium
I think the L-shape iron needs to be welded with the L upright and outside . Like I did in my setup cause its gonna interfere with the block.

And you painted it to soon !! LOL !!
 

gsxrken

Member
After thinking about what you said I’m afraid you might be correct but I don’t know for sure yet. My angle iron corner might contact the block before the holes line up. I did not think of this possibility- I was proud of myself for thinking that this way would be easier to catch the bolts.
 

gsxrken

Member
Had an idea - can you measure your block again for me? This time I need to know the distance from the center of the motor mount bolts to the side of the block. This will tell me if my angle iron will hit the block. I have 1-1/4” from center of holes to the corner of the angle iron.
 

B67FSTB

The NorCal dude from Belgium
Ok. Will do . Notice that distance A and B are not the same on both sides.!!

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B67FSTB

The NorCal dude from Belgium
center of the motor mount bolts to the side of the block = 20 mm
As your image shows :
Left side , angle iron should not be longer then 10 mm from center front bolt hole
Right side is 20 mm due to oilfilter flange.
Hope this will help.

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gsxrken

Member
Thanks for asking- and thanks to your help it worked out nicely. I had to get smaller angle iron and rotate them as you suggested. The engine was safely transported 18 hours to GA and is already between the shock towers.
 

gsxrken

Member
351W Pro Flo 4 EFI Vintage Air serpentine
(My son’s... not mine!)
 

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