I just bought a 84 Z28 with a 383 stroker as a project but im considering just selling it and buying an lt1 z28, but first i wanted to see how much it would run me to fix stuff on this one. The motor needs a rebuild im told because it blows blue smoke out on start up or when i stomp on it, but the motor runs like a champ other than that. Also I need a tranny rebuild, its a T5 and the first and second gear synchros are going out, in first it pops out of gear one or two times when i first get going(but when im slowing down as long as i downshift to first before coming to a stop it wont pop back out), and also sometimes second gear makes a grinding sound and i put it in neutral, then back into second and usually doesnt do it again and if it does i just go to third. Anyone know how much these rebuilds would cost roughly? Thanks.

 

More than likely if it smokes when you shift and start-up, it's only the valve seals. Try that first. They are 30$ and are the easiest to do next to a complete rebuild. But I rebuilt my 305 w/ all hi-perf. parts (cam, headers, race oil pump etc..) for like.. $800 I think it was. But try the seals first since that's a common sbc problem As for the tranny, don't know too terribly much there

 

that doesnt sound bad at all, thanks, hopefully someone will give me some info on the tranny soon

 

Figure about $1k for the motor and $1k for the tranny with $350 for the clutch. The t-5 can be upgraded with better hard parts to around 450ft lbs.

Don't spend money unless you have to, do a compression and leakdown test to see what condition the motor is in first.

 

I can almost GUARANTEE you it's the valve-seals But like the guy above me said, you can get better synchro's and whatnot for the tranny to beef it up, but that's about all I know on that