305 or 350?

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PropKat44

Not-quite-so-new-guy
Nov 28, 2006
28
0
1
Glenville, NY
I swapped a 307 for a 305, due primarily because the 307 blows and i had the 305 redily available. I think all you need is mounts and a crossmember(i got, and would suggest the jegs crossmember w/ dual exhaust humps for later mods). My 305 is up in the 275hp range on very light mods and its fun to drive ... but if i behave, its still a 305 and not a 350. I dont see any probs w/ the 305 especially of you have it or can get it cheap (ie $200)
 

82355supreme

Greasemonkey
May 16, 2006
244
1
0
Wisconsin
Nothing really wrong with a 305 that's built right. But..... the old saying still holds true, "no replacement for displacement".
 

c_unit productions

Not-quite-so-new-guy
Jan 5, 2007
24
0
0
florida
if u have access to a welder and some tubing like from a roll cage u can take some angle and the tube and make a x-member. i have went thru the same thing we actually just notched out the cross member a little to clear the pan and it worked fine. but i, would now, do the tube cross member for me its a lot cheaper if u can do it urself.
 

c_unit productions

Not-quite-so-new-guy
Jan 5, 2007
24
0
0
florida
82355supreme said:
Nothing really wrong with a 305 that's built right. But..... the old saying still holds true, "no replacement for displacement".
that is true!!!!! the both use the same crankshaft. i would go with a 350!!!!
 

averagewhiteboy

Master Mechanic
Jun 7, 2006
370
1
0
Pittsburgh, PA
Alright guys... I've been thinking.

I have the 3.8 V6 with 3 speed transmission. What is the transmission code or whatever for that? What's the transmission code for the 4 speed auto that came in the 86 Monte SS that I'm considering buying the power plant from? It sounds like you need a new transmission crossmember for the 5.0 swap, correct? Will you use that same crossmember for a 350 too? Can the 4 speed from that 5.0 bolt onto the 5.7? Because if it can, I'll just need to buy a 350 block the following year, instead of the whole assmembly. That works for me.

Please let me know all this asap! I'm concocting (sp) and idea!

:twisted:
 

RedHotRegal

Master Mechanic
Mar 26, 2006
266
0
0
Ontario, Canada
The crossmember is only different for the trannys. The th200/350 both use the same trns nomatter what engine its bolted too. same for the 200r4/400 is the same crossmember nomatter what engine its bolted too.Its the engine mounts that are different between the v6 and the v8's I believe. But they shouldn't be to much of a problem to get they might even be on the engine your looking at.
 
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