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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: Nov 2005 Posts: 41 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 41 | I just finished restoring my 69 Step Side C10 and I am thinking about swapping out my 230 for a 350 in this truck since I have a major oil leak. First question is can I drop the oil pan without pulling the engine and second question is will a 350 adapt to my 4 speed transmission or would I have to swap out both?
Chevy Pete
| | | | | Joined: Feb 2004 Posts: 29,792 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,792 | The 230 and the 350 have the same bell housing bolt pattern, so the 350 will bolt in without a problem. You'll also find that the front motor mounts for the 230/250 sixes and the V8's are in the same position. A 292 six has the passenger's side mount offset about 3" forward. If you loosen the motor mounts and jack the engine up high enough, the oil pan should come off, but getting it back on without creating a leak can be a challenge. What's the reason for pulling the pan?
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: Nov 2005 Posts: 41 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 41 | Thanks for the information Jerry. I'm considering pulling the pan to stop the leak if that is where it is leaking form.
Chevy Pete
| | | | | Joined: Feb 2004 Posts: 29,792 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,792 | Invest in a pocketful of quarters for engine degreaser at the local coin car wash. It's very difficult to pinpoint the source of a leak if the whole engine compartment looks like it was in a gusher in a Texas oilfield. There used to be a bright red dye we could put in the crankcase to help locate the source of a leak- - - -don't know if that stuff would still be on the market since the tree huggers started getting a case of the vapors about common sense diagnostic procedures!
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 2012 Posts: 339 'Bolter | | 'Bolter Joined: Oct 2012 Posts: 339 | Yes they still have the dye for different oils. I just used some on a d-max coolant leak and presto there it was. o-ring between engine block and trans adapter. UGH, big job, hope customer declines 
1936 GMC T-14 restro-mod
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