Grn92LX said:
Ehh, huh? What the HELL went WRONG?
Anyway, do a n/a 347 and be done with it. A done right 347 WILL make more power than a stock rebuilt 302/306 with a s/c. You can do 400rwhp easily with a little thought on the combo with in the stock eec's 6250 rev limiter. Whats your budget?
Well, First he ordered a 327 500HP COMP HAWK LONG BLOCK from D&D. It was supposed to make 500 flywheel HP so he figured he would settle for a safe 380 at the wheels. Well he got it together with all the misc. stuff he needed to go along with it including Accufab Throttle Body, 42 lb. injectors, 80 MM PRO-M, 1 3/4" BBK Jet Hot long tube headers w/custom X -pipe.....etc.....
It made 338 RWHP.

He called D&D and they said they would send him a newer camshaft that would help. He paid me to put it in and it made 348 RWHP.

So he brought it down to a local Mustang Shop to see what they could do. He ended up having the Holley intake Fully ported and had to have the AFR 185 heads matched up to the new intake. Also he had the heads milled and went with a Cam Motions custom grind cam. In order for the cam to work he needed special springs to keep up with it so he got K-Motion springs and had to have the heads cut for them to fit.
Put it all back together and made 385 RWHP. He then cut the collectors off the headers and put on race collectors to replace the small ball joint collectors that BBK's come with. Had them RE-Coated. and dynoed it again. 400 RWHP!!! Woo hoo!!! Also he just got done having an exhaust shop fab up a custom cold air intake pipe. it made 407 RWHP and 393 ft. lbs. He ran it 4 times and was running 118.00 MPH in a 3350 lb car. Went back to the track again and a valve spring failed and the valve went into the motor. BYE BYE Motor!!! He broke the block, the head, the piston, and the pushrods, and rockers. Now he had to buy another block, AFR head, Pistons, rockers, pushrods, etc.....and pay for all the machine work over again because he was trying to push the N/A combo to make power. Also the driveability with the cam was for $h!!. Needless to say over $12,000 later and he still doesn't come close to a stock block motor with a stock cam and good heads and intake with a blower.
Three of our friends have stock 302/306's with superchargers. All make over 500 RWHP with the top one making 556 with a very mild cam. 2 of them run Novi 2000's and one runs a Vortec S Trim. Then one's with the Novi's idle stone stock and have stock drivability. The one with the S-Trim idles a little louder and the blower whines a little more. It ran 10.80 on ET Streets at 129.00 MPH.