hey guys i am realy realy set on using a 400 but i am told it is kind of hard to do and use tpi... but i realy want to usemy tpi set up for now..... right now it is an 86 305 tpi tyhat i will be using.... so what will i have to change to use the tpi on a 400.... i have herd what is needed to be changed for a 350 but not a 400.

 

I ran a 415 with the stock TPI intake, I went to 24# injectors and reprogrammed the PROM, it ran great until about 4500 then it fell dead on its face.

 

Well, I got a 395 cu.in. stroker in my MAF '87 IROCZ. Is that close enough? Details in my sig, and I do burn my own Eproms.

Mechanically, I dont know if there would be any mismatch between the heads and intake, such as, bolt holes not aligned.

 

I have 389 CID motor running a MAF but it's a Granatelli adjustable MAF. I think you won't be happy with a stock intake and runners on a 400.

 

With 400 cubes, you should have plenty of bottom end grunt, therefore in place of a TPI (which is taylored for more bottom end) install a Holley Sleath Ram, and spec the cam accordingly. I have been considering doing the same thing next year.

 

i would be using slp runners, base, and a 58 mm throttle bodie... would that help me out a bit ata ll....

 

Yes, those will help. You'll have great low end torque. I do agree that you would be happier with a Stealth Ram if emissions isn't a concern.