ok here goes. bought a 93 a4 z28 with a seized motor. i just purchased a 7,200 original mile shortblock out of a 95 with documentation and saw car it came out of. i got a very good deal luckily. now i have a few questions. the motor i just purchased has an lt4 hotcam in it. im going to be using the heads and intake off my old motor and its completly stock so should i swap in my lt1 cam in the new motor or will the hot cam work until i buy the supporting stuff. also my 93 motor has an actual msd opti spark thats like 2 months old and those are pricey from what ive seen. will that work on my 95 motor? i know the 95 to 97 is diff but didnt know if 93 would interchange. if not that will be okay i suppose i could sell the msd to fund the other stuff i need. im sorta new to these cars this is my 2nd but any help would be appriciated.

 

What kinda intake/heads setup is on the motor currently with the hot cam???

 

i thought i mentioned but the lt4 hot cam is in the the good 95 block i just purchased it was just a short block no heads or intake. im taking my heads and intake off my seized 93 motor to put on the short block. but the heads are stock everything on the 93 motor was. its just i got a good deal on this 7200 mile shortblock but the lt4 cams already in it. if that helps

 

The opti from the 93 won't fit the 95, the drive connection is different. It would work if you used the cam and timing chain cover from the 93, but then there goes your hot cam.

 

thanks for the info on the msd opti camaro69..thats what i figured now i gotta think of a price to sell it for since its practically new and does me no good.

 

actually all u need is the timing gear,,, i think u have to grind the pin down so it will go on. did u get the front cover with the motor. the newer opti is better.

 

Oh ok my bad, didnt read it right. Yeah i think craby has it from here. Lol. He know his stuff dude.

 

By "the newer opti", did you mean his new, better, and vented MSD opti? And right, the splined timing gear should work to be able to accept the MSD. I was thinking the other way around, where you have to drill out the center hole of the old style cam to fit the larger shaft of the new style opti. But he's not going that way.

 

yes sir the vented and better oil sealed opti. i ended up buying a timing cover. sold my 1 yr old opti and got the newer style.

 

the 93 seized motor has the msd opti and the motor im using has the vented factory gm opti. selling the msd opti to a buddy. thanks for all the help. now if anybody could answer my question from my post up top about leaving my lt4 cam in the new motor or swapping the lt1 in it beings i dont have the springs, rockers, etc at the moment.