hey i have a 1986 trans-am that has the 305 tpi and gona swap it for a 1989 350 L98 that i found localy i went to check out the motor and it was complete with all accesories and had the stock wiring harness but it was cut in sum spots. now i know i can use my stock wiring harness but the question i have is my wiring harness still has the cold star injector what do u do with it wen i swap in the new motor?....and sum connectors to the distributer broke cause they were britel is there any way i can splice new ones of the same in its place? and will i need anything else to complete the swap?...and before i drope it in im going to rebiuld it how do u make a 350 bored over to a 355 what size would i need to bore the block in order to achieve a 355? please help

 

If you have the correct '89 350 TPI prom for the engine you don't need the CSI.( cold start fueling is built into the program )
Can just leave injector in place to fill the hole or buy fancy blocking plug
If you have a prom for '86 - '88 350 then CSI will still be needed so hook up wiring to it


355 is 350 bored 30 over

 

ok yeah the motor has the PCM the 1989 L98 350 TPI i think i just rather block it off....ill remember that .030 bore so wen i rebiuld it ill let the machinest know....how about the clips on the connectors for example on the distributer it has a conector that has a clip and ur supposed to lift the clip just enough to unplug it well thatlittle clip broke the connection is still good just the clip broke cause its old and britle can u swap a new clip and splice it from the wiring harness of the 1989?

 

The machinist will let you know what he can do.
30 over is std re-bore anyway for virgin blocks
But if your motor has been bored before or has too much wear you may have to go 40 or even 60 over to clean it up