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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Oct 2015 Posts: 12 New Guy | | New Guy Joined: Oct 2015 Posts: 12 | looking for anyone who has used the trans dapt engine mounts for mounting there engine. I am trying to find out where I could easily bolt them in/drill the bolt holes since no one makes a true bolt in mount. didnt know if anyone could take a measurement of where on the 58 frame that they made there holes.. | | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | Be best to make your own mount locations to fit your application, accessories and truck exactly.
Ed
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
| | | | | Joined: Feb 2004 Posts: 29,777 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,777 | A 350 is exactly the same size, and mounts the same way as the 283 that was available as original equipment. Why would you need custom mounts?
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Oct 2015 Posts: 12 New Guy | | New Guy Joined: Oct 2015 Posts: 12 | not really looking to do the front engine mounts | | | | | Joined: Apr 2015 Posts: 336 Shop Shark | | Shop Shark Joined: Apr 2015 Posts: 336 | Are you changing the transmission out too? To use the mount you want, you'll need a trans that has mount holes on the tail shaft (like a car).
1959 3100 Apache Fleetside
| | | | | Joined: Oct 2015 Posts: 12 New Guy | | New Guy Joined: Oct 2015 Posts: 12 | doing a TH400 and have the aftermarket mount for that to install so I have to unbolt the factory trans crossmember and figure that part out. | | | | | Joined: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | with an automatic you can't use the original front mounts, need to fit the aftermarket side mounts in as you go - if the mount you got is the type like the trans mount that can be bolted inside the channel, just 'suspend' everything in place with the mount cross bar attached to the engine and mark the holes, don't try to guess using someone elses measurements from a different installation
Bill
| | | | | Joined: Oct 2015 Posts: 12 New Guy | | New Guy Joined: Oct 2015 Posts: 12 | more or less looking for front to back measurements as in how from harmonic balancer to the front of original crossmember.. things that are measureable.. | | | | | Joined: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | the front face of the block should be just behind the front cross member where the original front mounts were as seen here .... sets the fan about 1/2" from the rad and leaves just enough clearance from the firewall for the distributor - if you've got the HEI, you'll need to have the engine as far forward as you can get it for enough clearance Bill | | | | | Joined: Oct 2015 Posts: 12 New Guy | | New Guy Joined: Oct 2015 Posts: 12 | Thanks Flxible, great reference point! | | | | | Joined: May 2005 Posts: 8,983 Sir Searchalot | | Sir Searchalot Joined: May 2005 Posts: 8,983 | Ref points are great for "coarse" planning but you should not install a motor and trans into it unless you mock it all up, settle everything on it's purposed place. Check carb mounting surface for level, check all kinds of clearances like steering box/column shaft, exhaust, hole in floor, dizzy, fan, pulley, pinion angle... before drilling or welding. Not to say you are doing this but you shouldn't do it by measuring as others have said.
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn
| | | | | Joined: Feb 2004 Posts: 29,777 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,777 |
a bare block and an empty trans case make mount positioning an exact science, not a SWAG. Guessing is for crystal ball reader, not chassis builders. It's got to be EXACTLY right!
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Oct 2006 Posts: 1,847 'Bolter | | 'Bolter Joined: Oct 2006 Posts: 1,847 | they make a plastic engine just for this purpose, I don't know if it would work attached to the transmission or not. Or how much it would cost. Might be worth looking into though. | | | | | Joined: May 2005 Posts: 8,983 Sir Searchalot | | Sir Searchalot Joined: May 2005 Posts: 8,983 | Too much money for one time. $300-$450 for plastic. Better to use the actual motor and trans. Nothing better than that. Has all accessories and such. A bare block and tranny case is good for building a hot rod from scratch. I feel that when swapping, you need all the real deal, right down to hood clearance for the air cleaner. (not a problem on these trucks). You gotta have the pulley and fan and dizzy on there and carb mounting surface leveled, etc.
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn
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