230 & 250 L6 Differences? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

hotrodmtodd · 07-25-2005, 07:55 PM

I have a 250 L6 from a '71 Chevy truck that I would like to put in one of my '66 Chevy IIs. Can I swap the Nova oil pan & pump to the 250? Are there any other items I will have to change to make it work? Any info will be appreciated. Thanks, Mike

pritch · 07-25-2005, 11:04 PM

I don't know if the oil pans are different between cars and trucks, but I just went through this and the only difference between the two is the crank and the pistons. I found this out the hard way. I bought a new piston for my 250 only to later find out that someone put in a 230 crank and pistons. My 250 is really a 230. The 230 pistons are the same as a 283 v8, and 250 pistons are the same as a 307 v8. Anybody need a brand new 307 piston?

Fred T · 07-25-2005, 11:56 PM

Take a close look at where the alternator, power steering and such bolt on. That is about the only difference in the block and head. Also check the height of the intake and carb. If you have to you can swap the manifolds. All in all, it should be a simple swap.

jimfulco · 07-26-2005, 03:50 AM

250 pistons are not the same as 307 pistons, although the dimensions are very close. The 250 piston is dished, while the 307 piston is a flat-top. There is also a slight compression height difference.

hotrodmtodd · 07-26-2005, 08:46 AM

The Chevy II has a VERY unusual oil pan for those who have never seen one. The oil reservoir is in the center because of the suspension, instead of the back like other cars and trucks. As long as 230 and 250 have the same bolt pattern for the pan, I should be alright. I will keep everyones advice in mind. Thank you, Mike

timmosams · 07-26-2005, 09:30 AM

Fred T · 07-26-2005, 12:15 PM

A little inspiration.

hotrodmtodd · 07-26-2005, 01:13 PM

Fred,
That's a DIRECT LINE to a hot rodders heart right there! Multiple carbs and finned aluminum, YES! Thanks for that, maybe you can fix me up with a link for your supplier? Thanks again, Mike

Fred T · 07-26-2005, 02:45 PM

I wish it was mine. It's in a 37 Chevy owned by streetroddertim at www.myoldtruck.com . He doesn't get on the net much. Most of the parts are Clifford, but I don't know where he bought them. One place is www.stoveboltengineco.com one of the sponsors at www.inliners.org . That 250 puts out about 300 hp.

07-25-2005, 07:55 PM	#1
hotrodmtodd 'Burban Legend Join Date: Apr 2005 Location: Mingo Junction OH Posts: 918	230 & 250 L6 Differences? I have a 250 L6 from a '71 Chevy truck that I would like to put in one of my '66 Chevy IIs. Can I swap the Nova oil pan & pump to the 250? Are there any other items I will have to change to make it work? Any info will be appreciated. Thanks, Mike __________________ '67 Chevy Iron City Beer Truck (9ft step) '67 Chevy Panel Truck 467 '68 Short Fleet 305v6 '68 McLaren Ramp Truck '68/'68/'70/'71 Burbs 292/366/402/454 '69 C-30 dump '71 C-50 dump and church bus '71 4x4 454 '72 Blazer (w/pop-up camper) $15 x-hooks '66 Chevy II 194/Weber '68 El Camino" 305v6 '69 Skylark 455 Buick '70 Chevelle 427 '71 Cutlass W-31 '71 GTO 400 2x2 "The 51" Chopped '51 Chevy (409) my first car OK Toad, we'll take 'em all... John Milner

07-25-2005, 11:04 PM	#2
pritch Registered User Join Date: Mar 2004 Location: Hoytsville, Utah Posts: 3,365	I don't know if the oil pans are different between cars and trucks, but I just went through this and the only difference between the two is the crank and the pistons. I found this out the hard way. I bought a new piston for my 250 only to later find out that someone put in a 230 crank and pistons. My 250 is really a 230. The 230 pistons are the same as a 283 v8, and 250 pistons are the same as a 307 v8. Anybody need a brand new 307 piston? __________________ '68 Panel Project Boogie Chillin' '68 C-10 Ol' Green

07-25-2005, 11:56 PM	#3
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	Take a close look at where the alternator, power steering and such bolt on. That is about the only difference in the block and head. Also check the height of the intake and carb. If you have to you can swap the manifolds. All in all, it should be a simple swap. __________________ Fred There is no such thing as too much cam...just not enough engine.

07-26-2005, 08:46 AM	#5
hotrodmtodd 'Burban Legend Join Date: Apr 2005 Location: Mingo Junction OH Posts: 918	Sounds Promising The Chevy II has a VERY unusual oil pan for those who have never seen one. The oil reservoir is in the center because of the suspension, instead of the back like other cars and trucks. As long as 230 and 250 have the same bolt pattern for the pan, I should be alright. I will keep everyones advice in mind. Thank you, Mike __________________ '67 Chevy Iron City Beer Truck (9ft step) '67 Chevy Panel Truck 467 '68 Short Fleet 305v6 '68 McLaren Ramp Truck '68/'68/'70/'71 Burbs 292/366/402/454 '69 C-30 dump '71 C-50 dump and church bus '71 4x4 454 '72 Blazer (w/pop-up camper) $15 x-hooks '66 Chevy II 194/Weber '68 El Camino" 305v6 '69 Skylark 455 Buick '70 Chevelle 427 '71 Cutlass W-31 '71 GTO 400 2x2 "The 51" Chopped '51 Chevy (409) my first car OK Toad, we'll take 'em all... John Milner

07-26-2005, 12:15 PM	#7
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	A little inspiration. Attached Images __________________ Fred There is no such thing as too much cam...just not enough engine.

07-26-2005, 03:50 AM	#4
jimfulco Registered User Join Date: May 2003 Location: Shreveport LA Posts: 3,170	250 pistons are not the same as 307 pistons, although the dimensions are very close. The 250 piston is dished, while the 307 piston is a flat-top. There is also a slight compression height difference.

07-26-2005, 09:30 AM	#6
timmosams Registered User Join Date: Oct 2002 Location: Watauga, TN Posts: 65

07-26-2005, 01:13 PM	#8
hotrodmtodd 'Burban Legend Join Date: Apr 2005 Location: Mingo Junction OH Posts: 918	VERY Blue Flamish! Fred, That's a DIRECT LINE to a hot rodders heart right there! Multiple carbs and finned aluminum, YES! Thanks for that, maybe you can fix me up with a link for your supplier? Thanks again, Mike __________________ '67 Chevy Iron City Beer Truck (9ft step) '67 Chevy Panel Truck 467 '68 Short Fleet 305v6 '68 McLaren Ramp Truck '68/'68/'70/'71 Burbs 292/366/402/454 '69 C-30 dump '71 C-50 dump and church bus '71 4x4 454 '72 Blazer (w/pop-up camper) $15 x-hooks '66 Chevy II 194/Weber '68 El Camino" 305v6 '69 Skylark 455 Buick '70 Chevelle 427 '71 Cutlass W-31 '71 GTO 400 2x2 "The 51" Chopped '51 Chevy (409) my first car OK Toad, we'll take 'em all... John Milner

07-26-2005, 02:45 PM	#9
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	I wish it was mine. It's in a 37 Chevy owned by streetroddertim at www.myoldtruck.com . He doesn't get on the net much. Most of the parts are Clifford, but I don't know where he bought them. One place is www.stoveboltengineco.com one of the sponsors at www.inliners.org . That 250 puts out about 300 hp. __________________ Fred There is no such thing as too much cam...just not enough engine.

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