Will pre 86 heads bolt onto my 89 305?

 

Yes.
Your intake manifold will not match up.

What '86 heads do you have? Why are you replacing your '89 heads? what intake do you intend to use?

 

Im planning ahead. Putting on better flowing heads, intake, cam, bigger injecters, and a full exhaust on to get a little more ummph. Any suggestions?

 

I dont know any heads that were made in the 80's that would flow any better than the ones on you stock 89? Unless their aftermarket etc??

 

There were only two differences on the '86 changeover (one '86, one '87)

1) Valve cover bolt pattern changed from perimiter bolts to center bolt ('87)

2) two center intake bolts angle changed from 90* to intake surface to straight up.

#1 will not matter which intake type you use, and the other only requires a little minor grinding of the bolt holes in the manifold to make it work.

 

He's got a stock '89 TBI. Terrible heads if you want anything beyond what the factory did with them.

Good '86-earlier heads are 416 and 601 castings. Post-'87 equivalents would be 081's. Go with the 081's, everything will bolt right back onto them.

 

Exactly.

Ill take a look. Thanks.

Should I keep the I also?

 

Not sure what you mean by that.

 

Sorry. My bad. Should I keep the Throttle Body Injection or will it be too much of a hassle to burn chips? My end goal is close to 280-300hp and somewhere 300-400tq.