Motor swap question

[77chevyinline6]

im yanking out the half dead 250six for a 307v8 the owner says it a 84 year motor.what kind of car/truck could have this came out of? my transmission is a 3 on the tree am i going to have any problems with this or should i look for a different motor?

[Car'n'Guitars]

It should bolt right up.

[76stepsidechevy]

I dont think they were making chevy 307s in 84. You might have an oldsmobile 307 there, what is it coming out of?

[77chevyinline6]

im thinking oldmobile too. and i do not know im going to look at the motor later on this week . im debating whether to get it or look elsewhere

[76stepsidechevy]

Thats a decent motor, probably not any more power than your 6 though and im pretty sure it wont bolt to the trans you have unless its dual pattern. Theres a chevy trans bolt pattern and then a buick,olds,pontiac pattern. You might get a little more torque out of it, maybe mileage, and of course that v8 rumble that makes it all worth it.

[Car'n'Guitars]

Sorry I was thinking it was a Chevy 307.

[77chevyinline6]

i really need it to bolt up to my transmission though and yes im doing this because my six runs bad and costs too much to get right what would you do in this situation just look somehwere else?

[76stepsidechevy]

I'd still go look at it. Maybe the guys wrong about what the motor is. You'll know right away just looking at it if its an olds or chevy. He could be worng about the year or the motor size. It could be a 305 or and earlier chevy 307. If this doesn't work out for you i'd look for a 350, a 305 probably wont get you any better mileage in these trucks. The best you can do is keep it tuned up and keep your foot out of it. A good quadrajet will probably get you the best mileage and have the power when you get on it. Its got primaries the size of quarters and huge secondaries.

[77chevyinline6]

how could i tell what motor it was?

[Car'n'Guitars]

The numbers off the engine.

[76stepsidechevy]

a chevy will have more squared off valve covers and an olds are more rounded, the intake manifold is pretty wide on the olds as well. A dead giveaway is the distributor goes through the intake on a chevy and not on the olds.

[Car'n'Guitars]

Originally Posted by 76stepsidechevy

a chevy will have more squared off valve covers and an olds are more rounded, the intake manifold is pretty wide on the olds as well. A dead giveaway is the distributor goes through the intake on a chevy and not on the olds.

Or that.

[77chevyinline6]

thanks if its a chevy motor it will probable come home with me then i will have to worry about the bolting up to the transmission problem which i hope goes well.....

[Car'n'Guitars]

Good luck man I hope it works out the way you want it to.

[77chevyinline6]

thanks alot man it should go alright ill have 3 other people helping if it dont bolt up to the transmission i guess i get to go transmission shopping lol.

[Car'n'Guitars]

Yeah you could go that way too. It's always good to have some recruitments so when things go wrong you can blame them.

[77chevyinline6]

Good idea!

[Car'n'Guitars]

That's how I do it.

[77chevyinline6]

i think im gonna head to my local pull a part and look for a motor that is in a c10 just to be safe im gonna make sure it is bolted up to a 3 on the tree also

[Car'n'Guitars]

Good luck.

[77chevyinline6]

thank you i actually found a place where they already have the motors pulled and on the shelf

[Car'n'Guitars]

That's awesome wish I could find a place like that around here.

[77chevyinline6]

yeah its about 30min away going there this weekend im pumped

[Car'n'Guitars]

Oh well might get a 383 stroker for my truck.

[77chevyinline6]

thats nice actually really nice haha, what motor is in your truck right now?