Olds 307 into an 89? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Russell · 06-12-2005, 05:58 PM

Hey!

As some of you may know, I blew the 305 in my 89 up, so I am looking into other options. I've got a Delta 88 with an Olds 307, and an overdrive tranny (I think it is a 200r4)

What all would it take to physically bolt it into the 89? Just new engine mounts?

What about the exhaust, will the 307 have similar manifold angles / positions as the Chevy?

Also, would the coolant drain plugs be the same size as a chevy engine for the knock sensor?

Also, does anyone know if a TBI will bolt to any standard 2 barrel intake? If I did go this way, I would want to bolt the TBI ontop of the 307.

Thanks!

Russell

Tom · 06-12-2005, 07:14 PM

I don't think any olds motor was ever avalible in a 88+ chevy truck unless they came with a 350 deisel, so no motor mounts are readily made.

*1FaastC10* · 06-13-2005, 12:50 AM

you could do the TBI swap with a 454 TBI adapter from a 90+ truck. the only thing i would worry about would be the programming in the PCM. an Olds 307 is very different from a 305, and cam profiles would be very different as well. it COULD be done, but worth it? i dont see it being as cost effective as locating another 305 longblock and putting it in.

as for the mounts, look for a pre-82 diesel truck, these would have the 5.7 that Tom mentioned. might be able to make them work. what does the car have on it for induction now? carb? why not toss a good rebuilt QJet on top of it and call it good.

Russell · 06-13-2005, 02:21 AM

I can get a 2 barrel intake for it -- I personally don't think that the EFI will mind too terribly much. I am sure the cam profiles are probally a bit different, but the overall fuel consumption rate should be fairly similar. So long as the engine is getting good vaccum, the TBI should not even notice the difference, and just set the fuel mixture according to the 02 sensor.

Right now the 307 has a feedback q-jet on it. Doesn't start very good, and stumbles a bit on startup - which is why I want to go over to the TBI. I simply don't know enought about carbs. Considering my past attempts at fixing em, I don't think it is worth my time and effort, lol.

8t5Silverado · 06-13-2005, 12:35 PM

You could make your own engine mounts easy enough....

Depending on what tranny you have behind the 305, you may have to get a different driveshaft for the 200r4.

Tom · 06-14-2005, 07:45 PM

Quote:

Originally Posted by 8t5Silverado

Depending on what tranny you have behind the 305, you may have to get a different driveshaft for the 200r4.

Its a 700R4, no question about it. Cam profiles between the 305 chevy and 307 olds are very similar- puny and weak. The difference would be measured in a couple degrees duration at most [1-4].

Russell · 06-14-2005, 08:54 PM

sounds good Tom -- I just heard somewhere that many BOP engines had 200r4s in them.

If it is a 700r4, then the only thing I'll have to do is rig up some exhaust and bolt it in. I think I'll just run the carb on it. The carb starts good enough. If I find a 2 barrel 307 intake, I'll try the TBI on and see how it works.

Russell · 06-14-2005, 09:06 PM

Well, I just got offered a good 350 for 85 bucks, so I think I'll take it and put a much more desirable engine in, not to mention easier to install too, lol

Lynx · 06-15-2005, 01:26 AM

No kidding, go with the 350!

SSC's76 · 06-15-2005, 10:17 PM

Quote:

Originally Posted by Russell

Well, I just got offered a good 350 for 85 bucks, so I think I'll take it and put a much more desirable engine in, not to mention easier to install too, lol

Sounds alot better then using somthing with less power then a 305 of course if it is a 200R4 that peice might be of some value.

06-12-2005, 05:58 PM	#1
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	Olds 307 into an 89? Hey! As some of you may know, I blew the 305 in my 89 up, so I am looking into other options. I've got a Delta 88 with an Olds 307, and an overdrive tranny (I think it is a 200r4) What all would it take to physically bolt it into the 89? Just new engine mounts? What about the exhaust, will the 307 have similar manifold angles / positions as the Chevy? Also, would the coolant drain plugs be the same size as a chevy engine for the knock sensor? Also, does anyone know if a TBI will bolt to any standard 2 barrel intake? If I did go this way, I would want to bolt the TBI ontop of the 307. Thanks! Russell __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

06-12-2005, 07:14 PM	#2
Tom driving is in my blood Join Date: Dec 1999 Location: Mesa AZ Posts: 5,712	I don't think any olds motor was ever avalible in a 88+ chevy truck unless they came with a 350 deisel, so no motor mounts are readily made. __________________ -78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me.

06-13-2005, 02:21 AM	#4
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	I can get a 2 barrel intake for it -- I personally don't think that the EFI will mind too terribly much. I am sure the cam profiles are probally a bit different, but the overall fuel consumption rate should be fairly similar. So long as the engine is getting good vaccum, the TBI should not even notice the difference, and just set the fuel mixture according to the 02 sensor. Right now the 307 has a feedback q-jet on it. Doesn't start very good, and stumbles a bit on startup - which is why I want to go over to the TBI. I simply don't know enought about carbs. Considering my past attempts at fixing em, I don't think it is worth my time and effort, lol. __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

06-13-2005, 12:35 PM	#5
8t5Silverado Mudslides 'r my specialty Join Date: Dec 2003 Location: STL Posts: 1,106	You could make your own engine mounts easy enough.... Depending on what tranny you have behind the 305, you may have to get a different driveshaft for the 200r4. __________________ Always on the lookout for old cars and parts...(20s, 30s, 40s, 50s, 60s, etc.) http://www.cardomain.com/memberpage/500339

06-14-2005, 08:54 PM	#7
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	sounds good Tom -- I just heard somewhere that many BOP engines had 200r4s in them. If it is a 700r4, then the only thing I'll have to do is rig up some exhaust and bolt it in. I think I'll just run the carb on it. The carb starts good enough. If I find a 2 barrel 307 intake, I'll try the TBI on and see how it works. __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

06-13-2005, 12:50 AM	#3
1FaastC10 Account Suspended Join Date: Oct 2002 Location: Elkhart, IN Posts: 6,400	you could do the TBI swap with a 454 TBI adapter from a 90+ truck. the only thing i would worry about would be the programming in the PCM. an Olds 307 is very different from a 305, and cam profiles would be very different as well. it COULD be done, but worth it? i dont see it being as cost effective as locating another 305 longblock and putting it in. as for the mounts, look for a pre-82 diesel truck, these would have the 5.7 that Tom mentioned. might be able to make them work. what does the car have on it for induction now? carb? why not toss a good rebuilt QJet on top of it and call it good.

06-14-2005, 09:06 PM	#8
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	Well, I just got offered a good 350 for 85 bucks, so I think I'll take it and put a much more desirable engine in, not to mention easier to install too, lol __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

06-15-2005, 01:26 AM	#9
Lynx Registered User Join Date: Jun 2003 Location: Fort McMurray, Alberta, Canada Posts: 513	No kidding, go with the 350! __________________ Ben 1983 Silverado SWB 305 2002 Silverado Extended Cab 5.3 http://members.shaw.ca/bkennett



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