dixiebandit69

I'm swapping a 4.8 and 4L60e out of an '04 Tahoe into an '89 Firebird with a 2.8 V6 and a 700R4.

I'm going to be using 4th gen Camaro engine mounts, and I want to be able to reuse the factory driveshaft. I'm not concerned about the transmission crossmember, I can fabricate or modify that as needed.

I'm down to two choices:

UMI:
http://umiperformance.com/catalog/in...roducts_id=692

Or Hooker Blackheart mounts:

https://www.holley.com/products/exha...ts/71221003HKR

The Hooker mounts look great, and say that they have the proper mounting heights for each side, but they do not guarantee the ability to reuse the original driveshaft.
The UMI mounts are adjustable, but I don't want my engine to be lop-sided in the engine bay and hit the HVAC box (I'm going to be using the factory A/C box, and I'm notching my K-member for the compressor).

Thank you in advance.

Aviator857

I think you would be happy with either, the UMI has more adjustment built in which could be good or bad.

Match the trans cross member with the same company and everything should line up. Leave the mounts loose and when you get the engine in the car center the trans tail in the trans tunnel and the engine should fall into center and alignment in the bay. Then tighten down the mounts.

I used a BMR K-member and I wish it set the engine an 1/2 inch or more forward. Any mount you will be able to use the stock drive shaft. Both the 89 and the 00 drive shaft fit in my car when done... I am using the 00 because its aluminum. I'm actually going to loosen the k-member and see if I can get it forward just a little so I have a little more clearance on the firewall.

Robbie8586

I used the ones from Hawks. If I had to do it again I would use the Blackheart ones and transmission crossmember. I used the blackheart exhaust, which sounds great, but had to modify it to work because of the Hawks mount plates. I think the Blackheart ones push the engine a little bit forward which is nice for clearance.

dixiebandit69

Thanks for the input, guys.

I think I'm going to go with the UMI mounts because of their adjustability, unless someone talks me out of them.

ShiftyCapone

iTrader: (7)

If you are using the stock kmember I have a set of these brackets for sale. 99% brand new. PM me if interested.