So as you all know I was going to buy a goodwrench 350 off my uncle for 500 however a guy at work is willing to sell me his 355 that has a mild cam holly intake 305 heads and it has 5k miles on it for 525 any thoughts which I should go with

 

The 355 was built with at least an intention of performance. The Goodwrench 350 was a low-output replacement truck engine.

 

What about the heads, will I have to look into replacing them down the road, I'm not looking for a 200mph car just something decent

 

Depends which 305 heads are on the 355, but consider that the Goodwrench 350 comes with the worst of the worst.

 

The heads on both of them aren't very good IMO. I'd be anticipating replacement if you really want any decent power out of the motor.. and he didn't tell you what cam was in it?

 

He said its the largest cam you can use on stock converter, he didn't remember the specs on it

 

He also said the heads came off an 87 silverado he's supposed to look at the casting number and let me know

 

87 Silvy = TBI swirlies

I'm not sure which is worse, the 993s on the Goodwrench 350, or the swirlies on the other 350. Which is worse.... monkey poo, or dog poo? :shrug: Too close to call.

A "large cam" jammed under swirlies is pretty much a recipe for being as slow as a slug.

I personally wouldn't buy either one. Not sure I'd accept either one as a gift even. Are you sure these are your only choices?

 

yea at around 500 these are the only two options ive found, my third is to throw my L69 heads on either motor, thing is the bottom end is better on the 355

 

i was thinking about trying to get a cheap set of vortec heads and put on the 355 bottom end, now he said its an 86 and up motor so does that mean the vortec heads will bolt right to the holly intake or do i need a different intake. Im waiting for the federal government to pay up, go figure, but i found a set of vortec 5.7 heads in harrisburg which is an hour from me

 

If it doesn't have vortec heads already, you'd need a new intake.

 

jegs has a kit that has the carb intake, both heads and gaskets for $850, wish i had more money to spend on this build or id just order that kit and by the 355, anyone have experience with the jegs kit