Anyone on here ever built a stroker out of a 305. I have seen some kits on the market .And I'm thinking about doing it.

 

You would be better off just getting a 350 block and building your engine from there.

 

+1.

 

Blake,

It's been tried. Many times. Over the last twenty years.

Expect 300 horsepower for about $1200 worth of work, assuming you also do 30 hours of grinding to get some good flowing heads with lots of port velocity.

...or you can spend $800 and put in a used 350 that makes 350 HP.

 

what about torque,,,can the stoked 305 beat the 350 down low 1-3k rpm ???

 

NO. there is absolutely no benifit whatsoever over a 350. friends dont let friends build 305's please dont do it! take it out and use it for what it was intended... a boat anchor! ive been there done that. built a 335 and a H/C 305 and STILL got beat by a stock 350 tpi car...

 

so the 350 had more bottom to 3000 rpm ??? was the mpg better than a 350 ??

 

To tell you the truth I dont remember MPG. this was about 8-9 years ago. as far as bottom end power the stock 91 350tpi would pull the stroked 305 T5 from start to finish. it was rediculious! the 305 sounded mean as hell but was like a small dog barking.. all bark and no bite...

 

i'm looking at this for my 77 P/U ,, and going with a 200r4 or a 700r4 behind it

 

Dont bother, you will spend less and I mean ALOT less if you just pick up a 350 form the junkyard and rebuild it. all the 305 stuff bolts right up. I said it before there isnt any reason to build a 305....

 

i have a good running 305 ,,3.78(or is it 3.80) crank,,powder rods,,Edelbrock duel-plane (Q-jet) flywheel etc,,sitting

 

AND LET IT SIT! the machining ALONE will be more than buying a junkyard 350 and rebuilding with a rebuild kit through summit..... I know im sounding harsh but sometimes you have to be! there isnt a single person out there that has built a 305 and said "man im glad i didnt go to a 350" do yourselve and favor stop thinking about using the 305! please!

 

well the first reason is MPG for every day,,, the 305 i have is a 86 and it replaced a 78 350 and it didn't seem to lose anything ,, it did gain 3-4 mpg so i woundered,,,,,so i'll just stick the 305 in the 77 with a OD trans and be done

 

When I looked into it, I came to the conclusion that if your 305 can be used without doing any machine work in the short block, then it might be worth rebuilding the top-end with seals, a Summit cam kit, and a valve job. However if you need to do machine work, it's better to just get a used 350 shortblock for a couple hundred bucks because the 350 will have better torque than the 335. As for fuel mileage, if that is your ultimate goal, then keep the 305 stock, do not bother stroking it, and put 2.73 gears in your differential.

I *built* a 305: It ran okay. Nice stringy motor with healthy cam which ran 14.00 @ 101 MPH. However it was pretty high strung and a comparable 350 with the same mods would've been half to a full second faster. If you want performance, go build your 350. If you want fuel mileage, keep the 305 stock and just plop it in.

One final point: My 305 H.O. best mileage was 21 MPG, and I tracked it for over 90,000 miles. Two weeks ago, my fuel injected 385 stroker, on a 1500 mile trip, with a manual transmission, made 23 MPG. So mileage isn't just a function of displacement. It is part of the equation, but not the whole answer.

 

looks like i'll do the 305 and trans,,,, bet the OD is worth 3-4 mpg