The bumper is 4 pieces. Two steel shocks that support the bumper, the steel outer you see and a steel insert. You can replace the steel shocks with aluminum pieces, the outer steel cover with a fiberglass and the inner steel with an aluminum one that came on other buicks. I used the aluminum supports and aluminum inner then shaved the steel bumper, a good compromise of weight vs saftey.
Aluminum blocks have no drawbacks I'm aware of besides sheer cost, they are actually stronger since they are based on the stage design. If I had an extra 12k or so lying around I might throw one in but that money will be going to my next project. I've been throwing around a 4.1 stroker build but I'd like to drive the setup I have now for awhile before deciding on more power.
The coolest thing about the TCI is the ez-ecu that comes with it. You can actually control the shift points and how firm it shifts along with dozens of other settings. I can have it shift as smooth as a Cadillac then at the push of a button go into a race mode with hard, firm shifts at higher shift points to match the power band.
Thanks for the compliments and good luck with yours
Aluminum blocks have no drawbacks I'm aware of besides sheer cost, they are actually stronger since they are based on the stage design. If I had an extra 12k or so lying around I might throw one in but that money will be going to my next project. I've been throwing around a 4.1 stroker build but I'd like to drive the setup I have now for awhile before deciding on more power.
The coolest thing about the TCI is the ez-ecu that comes with it. You can actually control the shift points and how firm it shifts along with dozens of other settings. I can have it shift as smooth as a Cadillac then at the push of a button go into a race mode with hard, firm shifts at higher shift points to match the power band.
Thanks for the compliments and good luck with yours