Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - BBC Big Block Questions
View Single Post
  #4 (permalink)  
Old 01-20-2006, 04:21 PM
Super Streeter Super Streeter is offline
Member
 
Last photo:
Join Date: Sep 2002
Location: New Jersey
Posts: 416
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
pre 1990 trucks have the bst shortblocks,but the heads are junk.1970 thryu 76 passenger cars have o.k. shortblocks but the hads are better for mid level perfromance buildups.2 bolt of 4 bolt is no big deal at under about 1000 hp and 8000 rpm.Stock cast cranks are good to aout 700rpm and 650 hp depending in how you are making the horsepower{a 7000 rpm n/a engine making 650hp is harder on a crank then a 650hp nitrous engine that only spins 5500rpm}

The only upside to the truck shortblocks is the better rods in the 454's and tall deck engines,and the passenger car shortblocks are a good match to the stock passenger car heads since both are good for a lowbuck 550 hp buildup,but require upgrading beyond that point.The stock pasenger car heads can b upgraded to make 650hpif you dont mind sinking some money into them,but a far better choice would be to go a litle further and get some aluminum heads.If you are planning for aftermarket heads,then the truck shortblock is a better deal.

1990 and later shortblocks are o.k. and parts are available to build them up like any pre 1990 shortblock.The downside to them is that allthe heads are junk for anything but the mildest truck buildup.If you wanted to build a mid priced 454 for the street,you can do well with a 90's era 454 shortblock freshened up and fitted with the GMPP or Edelbrock rectoval heads and a hyadraulic roller cam if you can find a shortblock that came with one.

So that is pretty much where it is at.Good luck.
Reply With Quote