On a side-note, what would adding a 400 crank do to a 305?

 

With a 30 over bore make it close to a 340 ci motor, hot cam ,and heads look out!
Kinda like a 350 with the 400 crank but just 45 cubes less.
Had a dealer combo close to same setup in Monte Carlo SS once and a 400 had not a chance in same car both 85 SS'S.

 

Throwing in a 400 crank would probably cost more than swapping in a 350. You would need to buy the new crank and rods and have the block machined so that the counterweights will clear at a minimum. Assuming you do the rest yourself and get a cheap crank and rods set it will still be expensive. Without head work or new heads this addition will have only a small effect on high end horsepower. Realistically the 305 has too much stroke for the bore to begin with. It is rather unwise to stroke it more.

 

I have to support building the 305, considering I went down the same path- main reason I did this was due to the fact that most everyone is QUICK to rule out the underdog 305 for a 350- I find it fun being the underdog! My factory 305 LB9 lit up NUMEROUS 350's, L98's and what not prior to the rebuild- pick your parts and your builder correctly and I think you will find that the results shock you, as well as the guy staring at your taillights! Have fun with it!

 

Thanks man

 

That's the proper plan

- Justin

 

I learn from the best Justin

 

problem is that in todays performance standards the L98 isnt really considered that fast. if it dont run 13's bone stock it really doesnt stick out to any one. just my opinion. yeah the 305 can be built to be faster but it reaches a point sooner than that of the 350.

 

I agree 100%, however, the 305 does have potential to be a damn quick car, under the proper conditions ( parts + builder )- I find that most people are quick to label anything under a 350 "worthless" for some reason. Just my .02 cents-

 

Its not worthless, its just that its usually cheaper to swap to a 350 than it is to break into the heads or bottom end of a 305. Have fun with the 305. Its a good engine to start with. At least its a v8.

 

It isn't the fact that the 305 is smaller than the 350 that makes it suck. It is the engines **** poor design. Most people would gladly take a 327 or 302 over a 305 because of their superior design. 305's suck, and yes I have seen, and rode in some fast ones. That doesn't mean they still don't suck because they do. The 305 has a small, valve shrouding bore with too much stroke.

Martin

 

I had an 88 IROC with the LB9 T5 combo.I used to kill 4.6 GTs on a pretty normal basis.I then swapped in an L98 and sold the 305 to a friend.I wanted to see how much faster i was over the old engine so we lined them up.That sucker took me from the get go and got me at the end.But it was because i couldnt hook up.You can imagine the look on my face though getting beat by my just swapped out old engine I blew that motor racing an LS1 and swapped in a 400 bored over to 409.It was the rarer 4 bolt 400 and i had cam,headers,superram,etc.I couldnt get that car to hook up at all.A few weeks later we had a bad storm and a tree fell on it an smashed it so i really never got a chance to tune the 409.My point is i loved the 305 and it can be a pretty mean little sleeper motor.

 

Huh? Ever ride in one before? Stroke too long my fuzzy a$$. If you do sometime it will open your eyes a lil. They make a kit for a reason to do same thing. Chryslers are long rob short bore motors as well but I guess theie factory 340 wasn't worth it eiither huh? Funny thing is doing this swap gets you close to their dimension's used as well.
But then this comes from a guy who stroked a lil 262 (remember the monza's) and they were for **** well at least this one wasn't when it was done.

 

I'm just saying that I would rather have a normal 350 than a stroked 305. Stroking any stock engine is pretty unwise, including the 350. A 383 will only be marginally better (mostly low end torque) than a 350 unless you increase the flow of the heads, intake, and exhaust. Remember, these pieces can only flow so much air. The stock 350 TPI dies at something like 4500 RPM which means the 383 will hit the same point of restriction at an earlier RPM.

 

Not sure I follow you when you state unwise to stroke any engine. Reason alot of kits are out there are to increase power. If I follow your logic then it would be just as unwise to recam a motor with power in mind.
Dont take it as me being a wise A$$ because I am not (or at least trying to keep it to minimum).
Anyways with regards of the term "Building" is meant to improve or make better. Or otherwise it would be just rebuilding which in terms is "stock".
Now as far as stroked motors get yes it will need some help with a cam, heads and headers will be appreciated as well. All common stuff done during a regular rebuild and well it only waked up a otherwise sleeping turd.

The intake will work fine just gasket match it to heads. Meaning light grinding (read as real light) to the ports to try to get them even the gasket works great as a template.
Each to their own but strokers well.