NashFirebird

iTrader: (1)

I am swapping an LQ4 into my '68 Firebird. I am switching to factory style Camaro small block engine mount brackets, and using these adapter plates. I am using a Chevy TH350 with the same tailshaft length as the original BOP TH350. This may be a dumb question but will this combo reposition the engine from the factory location, necessitating the need to modify my drive shaft length and transmission crossmember? Thanks.

chevyboy91188

iTrader: (15)

I don't know the answer to your question but if you aren't afraid of a welder, the best thing would be to position the engine and trans so that the trans sat in its original position and then make the mounts so that they will put it there

68 RS Convertible

iTrader: (1)

I think your going to find that it is going to move somewhat, but the only way to know is to put it in there. You should be able to get the crossmember to work. I believe the holes in the sub-frame are elongated a bit for some front to back adjustment, as are the holes in the center of the crossmember where the mount bolts to. I think between the two you can make it work. As far as the drive shaft just put your yolk in the tranny and measure. I just did up an aluminum driveshaft out of a crown vic and I think it was 47 3/4, measuring from the center of the u joint cups. $110 to have it welded and balanced.

Marcello7x

iTrader: (10)

Where did you have it shortened and balanced? Im up in boston and not many places want to touch aluminum.

Marcello7x

iTrader: (10)

To the op, i am in a similar boat, the driveshaft i have is too short, so i bought an f-body shaft and am looking to have it cut and balanced to my exact length.

NashFirebird

iTrader: (1)

I was also looking at Crown Vic drive shafts. Were the yokes on the crown vic driveshaft compatible with your Chevy U-joints or did you have to modify them somehow?

68 RS Convertible

iTrader: (1)

Im in Warwick RI, there is a place called Rhode Island Driveshaft. There is also a place in East Providence RI, Cocroft that will do aluminim

68 RS Convertible

iTrader: (1)

I have a Tremec so the ford yolk fits it, I'm also lucky on the back end because I have a ford 9" rear so I just used all ford stuff. There are u joint's that have both chevy and ford cap sizes, that is what i used when I had my original steel driveshaft. I think I got those u joints from Autozone, or Advanced Auto. If your looking to do an aluminum driveshaft, the crown vic shafts are like 55" long so they can be shortened, and are relatively cheap compared to a Camaro/Mustang shaft.