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#76 |
Never enough time!!
Join Date: Mar 2004
Location: sw Wisconsin
Posts: 602
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Re: Ambulance engine
67-C30, me and a couple of friends ran into one of those ''smart guys" too once awhile back. We were discussing Chevy engines and talking about the LT-1, this guy says I have an LT-1 big block in my Firebird, we tell him that that is a 350...small block only; he responds....I know but I rebuilt it now its a big block....we laughed a little and told him that must have took alot of welding and machine work.....he was clueless!!!
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#77 | |
I have a radical idea!
Join Date: Jan 2005
Location: Sweet Home Alabama!
Posts: 6,513
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Re: Ambulance engine
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'67 C-30 Dually Pickup 6.2 Turbo Diesel, NP435 ‘72 C-10 SWB , 350 4bbl, TH350 '69 C-10 SWB , 250 L6, 3 OTT '69 GMC C3500, dump truck, 351 V6, NP435 '84 M1009 CUCV Military Blazer 67 C-30 Turbodiesel build thread http://67-72chevytrucks.com/vboard/s...d.php?t=254096 My trucks http://s226.photobucket.com/albums/d...ediafilter=all Member of the 1-Ton Club! |
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#78 |
Prestige member Old Farts Club
Join Date: Nov 2005
Location: Cleveland
Posts: 502
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Re: Ambulance engine
OK I learned something about 400's too that they came in 4 bolt mains also, but what about carbs? I always heard these were strictly 2 bbl carbs as they were meant to be low RPM torque engines.
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Hey sombodys gotta do it! ![]() |
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#79 |
Registered User
Join Date: Jun 2007
Location: oregon
Posts: 1,069
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Re: Ambulance engine
The one I had an "experience" with came out of a 76 4x4 with a stock 4 barrel manifold and carb (Quadrajet)
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69 K-20 cloned to a 67 with front clip and some other stuff. 383 .040 over Crane roller cam lifters and rockers ,1.6 intake ratio, Open chamber heads, 9.5-1 compression ratio, 2.02 intake valves , Edelbrock performer Air Gap manifold Carter AFB performer 750cfm, MSD ignition, SM465 NP205 4.10 gears: ![]() |
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#80 |
Registered User
Join Date: Jun 2007
Location: oregon
Posts: 1,069
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Re: Ambulance engine
Is the 307 realy that "bad" of an engine design? Seems like with the stroke of the 327 and same crank that it has potential..................what exactly is it about this particular engine that turns people away?
I happen to have one is the reason I ask.
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69 K-20 cloned to a 67 with front clip and some other stuff. 383 .040 over Crane roller cam lifters and rockers ,1.6 intake ratio, Open chamber heads, 9.5-1 compression ratio, 2.02 intake valves , Edelbrock performer Air Gap manifold Carter AFB performer 750cfm, MSD ignition, SM465 NP205 4.10 gears: ![]() |
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#81 |
I have a radical idea!
Join Date: Jan 2005
Location: Sweet Home Alabama!
Posts: 6,513
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Re: Ambulance engine
The early 307's got a bad batch of camshafts that had problems with the case hardening, and they would eat cams quickly, and they got a bad rep. All of the ones I have had (70-74 models) have been good engines. They have decent power and get decent fuel mileage. They are basically a 283, with a 327 crank. They are large journal engines as opposed to the 283's being small journal. I would run a 307 over a 305 any day of the week.
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'67 C-30 Dually Pickup 6.2 Turbo Diesel, NP435 ‘72 C-10 SWB , 350 4bbl, TH350 '69 C-10 SWB , 250 L6, 3 OTT '69 GMC C3500, dump truck, 351 V6, NP435 '84 M1009 CUCV Military Blazer 67 C-30 Turbodiesel build thread http://67-72chevytrucks.com/vboard/s...d.php?t=254096 My trucks http://s226.photobucket.com/albums/d...ediafilter=all Member of the 1-Ton Club! |
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#82 | |
Registered User
Join Date: Apr 2004
Location: N.E. MO
Posts: 1,749
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Re: Ambulance engine
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My very first car, (69 chevelle) had a 307 and it was a complete and utter dog. It would top out at 90mph downhill! That's the gods honest truth... I hated that motor and still hate 'em today. I had one other 307. It was in another chevelle a friend and I bought for parts. I blew up the motor that was in my car at the time and was forced to use the 307 out of the parts chevelle. I needed transportation. I had alot of fun with that 307, ( for a couple weeks), it very seldom seen anything but wide open. It's turn a little over 6000rpm if ya held it in low long enough.....LOL
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72 C20 4X4 454 4 speed 89 Trans Am (was) 305 TPI 700r4 93 C1500 2wd Extended cab 350 700r4 98 Sonoma (TPI outa the Trans Am) 03 Yamaha 660 Raptor 03/04 660 Raptor 07 700 Raptor 85 Honda Odyssey |
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#83 | |
Registered User
Join Date: Jun 2007
Location: oregon
Posts: 1,069
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Re: Ambulance engine
Quote:
The 400.................well...........................that's a whole different design of block..............realy not much can change that. Not much hope there!! ![]()
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69 K-20 cloned to a 67 with front clip and some other stuff. 383 .040 over Crane roller cam lifters and rockers ,1.6 intake ratio, Open chamber heads, 9.5-1 compression ratio, 2.02 intake valves , Edelbrock performer Air Gap manifold Carter AFB performer 750cfm, MSD ignition, SM465 NP205 4.10 gears: ![]() |
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#84 | |
Registered User
Join Date: Apr 2004
Location: N.E. MO
Posts: 1,749
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Re: Ambulance engine
Quote:
Yea, you're sorta right, but that is actually part of the problem. When somebody says 400 big block I imediately relate that as somebody who doesn't know what they're talking about. If they knew what they were talking about they'd say 402! It's kinda like kids lookin at the speedometer to see how fast it is...! LOL That number on the fender means nothing.
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72 C20 4X4 454 4 speed 89 Trans Am (was) 305 TPI 700r4 93 C1500 2wd Extended cab 350 700r4 98 Sonoma (TPI outa the Trans Am) 03 Yamaha 660 Raptor 03/04 660 Raptor 07 700 Raptor 85 Honda Odyssey |
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#85 |
Registered User
Join Date: Apr 2004
Location: N.E. MO
Posts: 1,749
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Re: Ambulance engine
I'd take the 305, (IMHO).
With todays fuel the 305's longer stroke makes alot better torque. One of the best engines I ever built was a stroker 305! (328 CID I think, 400 crank/stock 305 bore). The 307 probably would've been better back in it's day when RPM was the way to build power.
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72 C20 4X4 454 4 speed 89 Trans Am (was) 305 TPI 700r4 93 C1500 2wd Extended cab 350 700r4 98 Sonoma (TPI outa the Trans Am) 03 Yamaha 660 Raptor 03/04 660 Raptor 07 700 Raptor 85 Honda Odyssey |
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#86 | |
Registered User
Join Date: Apr 2004
Location: N.E. MO
Posts: 1,749
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Re: Ambulance engine
Quote:
Change components of a 307 or make sure you have a good cooling system on a 400. LOL ![]()
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72 C20 4X4 454 4 speed 89 Trans Am (was) 305 TPI 700r4 93 C1500 2wd Extended cab 350 700r4 98 Sonoma (TPI outa the Trans Am) 03 Yamaha 660 Raptor 03/04 660 Raptor 07 700 Raptor 85 Honda Odyssey |
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#87 | |
Registered User
Join Date: Jun 2007
Location: oregon
Posts: 1,069
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Re: Ambulance engine
Quote:
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69 K-20 cloned to a 67 with front clip and some other stuff. 383 .040 over Crane roller cam lifters and rockers ,1.6 intake ratio, Open chamber heads, 9.5-1 compression ratio, 2.02 intake valves , Edelbrock performer Air Gap manifold Carter AFB performer 750cfm, MSD ignition, SM465 NP205 4.10 gears: ![]() |
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