Ok so im looking into getting a 85 351-w from abuddy and was wondering if this block is worth building up, i already did a search but no info on this block. Thanks
Well, the 69 and very early 70 blocks were 9.48 deck height, the mid 70 through 74 blocks with 9.5 deck height are actually about 8/10lbs heavier, and all the weight is in the main bearing area. I just paid $350 for a std bore 71 block that had been mag'd/cleaned. The current block in the car is a 408 (I will be using the H-beam rods/4330 crank and Probe pistons in the $350 block. The old motor did a 9.801 last year in the Maverick and was tired(and it was a 72 block)...................I never went over 6800rpm and will also use this as a limit on my rebuilt stock block 408. Oh, did I mention the motor had been built in 1999 by CHP and was still running strong................early stock blocks are really good and I believe can handle 700hp.................If you are going to be spinning a motor over 6500rpm you had better think twice about external balancing and do it internally if you want it to live a productive life on the strip. As long as you don't spin it too much I believe the earlier blocks can do 700hp.............the later blocks, well 8/10lbs less material in the main web area is a LOT. IMHO
The good thing about cubic inches is that it brings the power band down, so you can make the same amount of HP as a High reeving 5.0L at a lower rpm
Awsome, im gonna use my heads off my 302,but do i have to get a roller cam with it or stick to hydraulic??
did anyone catch the last post of that FM thread? The person claims the rod length is what makes it a 408.
