Thread: Oldsmobile 403 Swap

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Would it be possible to swap an Olds 403 into a 73 Pickup? I know that somewhere along the line Chevy put a diesel 350 in their pickups and I think they have the same motor mounts as the 403.

>Would it be possible to swap an Olds 403 into a 73 Pickup? I know that >somewhere along the line Chevy put a diesel 350 in their pickups and I think >they have the same motor mounts as the 403.

Quite correct. Find a set of mount brackets from a diesel pickup and it should be a bolt in.

Bob

You will need the mounts from the 5.7 diesel as the 6.2 are different,I think the 5.7 was used from 78 to around 82 or 83. Jeff

The Olds 403, 350 gas, and 350 diesel all use the same engine mounts available new at Autozone for $9.99-18.00. But the 1973 GM pickups with Chevy gas engine frame might not have the holes drilled into the frame to use the Oldsmoble engine and mounts, as it was made well before the 1978 year the Olds diesel was used in any GM product, and part numbers for the Chevy gas engine mounts used in '73 and the Olds late 70's series engines are different.
Measure up before comitting to the swap, as it could be more work than finding or building a good Chevy engine. The frame holes could be there and match up, but you better be sure.

-Fordlords-

Where are you at, there is a very complete 5.7 diesel pick-up here at my local pick-n-pull in Moss Landing, California. I should pull the VIN off that truck and put it on mine so I don't have to smog anymore. Someone has probably already done it.

Oh, Deleware, that could be a problem... for you.

in california a vin swap to avoid smog is a very serious offense, we're talking prison here..... i work as a smog tech right now here in san diego.... you better be very careful...

A little off the subject, but how far back in model years does California go for a car to have to have the emissions test? For instance in New York any car now model year 1981 or older does not have to test or even have to have emissions equipment present, which is nice for the classic hot-rodder.

-Fordlords-

74 and older dont have to smog.... and the vehicle doesn't have to have up to date smog equipment, it must have the factory equipment all present though, if it fails visual inspection then it instantly fails smog.....

The problem is the Chevy trans won't bolt up to the Olds diesel w/o an adapter. The Chevy pattern is different from Olds, Buick, Pontiac and Cadillac.

Okay, for the know-it-alls, yes, the dowels will line up and you can get the bottom bolt in on each side. But that leaves 4 bolts left. Gonna run around with 2 bolts holding your trans to your engine? Yes, I have seen it done.

Other than that, no problem getting the engine in there.

Originally Posted by sparky2263

The problem is the Chevy trans won't bolt up to the Olds diesel w/o an adapter. The Chevy pattern is different from Olds, Buick, Pontiac and Cadillac.

Okay, for the know-it-alls, yes, the dowels will line up and you can get the bottom bolt in on each side. But that leaves 4 bolts left. Gonna run around with 2 bolts holding your trans to your engine? Yes, I have seen it done.

Other than that, no problem getting the engine in there.

just fill in some jb weld before its all butted up