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Old 03-27-2004, 05:52 PM
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350 to 305 engine swap

I have a 350 in my chevy k10 pick up. I am swaping that out to a 305 while I am rebuilding the 350. They are both 4 bolt mains. Should there be any problems, or should these motors both swap evenly. Is there anything special that I need to do when I do this?

Also, I have a holly 4bbl 650 cfm double pumper with a single feed fuel line on my 350 right now, will this be ok on the 305? Is there anything special that i should do if I'm using this carb on the 305 motor? Should I port & polish the heads or something? Will everything be fine for now?

Thanks once again.

Steve

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Old 03-27-2004, 06:04 PM
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Should bolt right in and be fine.
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Old 03-27-2004, 06:21 PM
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Re: 350 to 305 engine swap

Quote:
Originally posted by jrm123180
I have a 350 in my chevy k10 pick up. I am swaping that out to a 305 while I am rebuilding the 350. They are both 4 bolt mains. Should there be any problems, or should these motors both swap evenly. Is there anything special that I need to do when I do this?



Steve
Not that it matters, but to the best of my knowledge, there were no 4-bolt 305's ever made. The 305 will work fine and I wouldn't worry about all-out performance, I'd focus my time and efforts on matching parts for the 350 buildup!!
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Old 03-27-2004, 06:45 PM
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Ya can't say i ever heard of a 4 bolt main 305 let alone seen one
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Old 03-27-2004, 07:03 PM
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oops, i don't think the 305 is, i was thinking of the other 350 I have ( i have 2) thanks for all your input
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Old 03-28-2004, 02:03 AM
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what part # is that carb? Ive never seen a single inlet dp carb. thats strange. should work fine.
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Old 03-28-2004, 06:06 AM
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off topic, but what part of Massachusetts are you in?
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Old 03-28-2004, 12:46 PM
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http://cgi.ebay.com/ebaymotors/ws/eB...tem=2469562138

theres a link to a similar carb that I have. I don't have the part number of mine on hand.

Thanks for all your help
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Old 03-28-2004, 04:50 PM
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wont that be too much carb for a 305? i have a 305 also, i have asked a few carb questions on here and i was told that would be way too much cfm.
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Old 03-28-2004, 04:56 PM
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for a standard 305 you only need something like 500cfm's it doesnt really matter if you have more carb as long as its setup right.
the qjet that came on that motor was a 750.
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Old 03-28-2004, 05:03 PM
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I'm with bk, there is alot of room to work between what size carb will work and what is optimum! This 650 spread-bore d.p. is more that the 305 will need but should still provide decent drive-ability! Besides, he already has it and I presume it is functioning properly!
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