Could anyone give me an idea on what a good Rear End for my car could be???? I'm either getting a new 305 TPI, a 350 TPI or a new ZZ4 crate with a TPI setup on it.....

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1987 IROC-Z
G92, LB9 305 TPI, 3.23, Bright Red with Carmine Interior, Pioneer DEHP47DH CD deck.2 JBL DS645 4*6 (F).. 2 JBL DS965 6*9 (S).. Soon to get new 305 TPI

 

What you have will probably be just fine.

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Follow my racing progress on Stephen's racing page
and check out the race car

87 IROC-Z SuperPro ET Bracket Race Car
461 naturally aspirated Big Block

Best ET on a time slip: 11.242 altitude corrected to 10.89
Best MPH on a time slip: 121.52 altitude corrected to 125.89
Altitude corrected rear wheel HP: 481.6
Best 60 foot: 1.546

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley