The block plate on my Ford Racing 302 for GT/MA is one of the multi-fit deals. Looks like this:
http://www.summitracing.com/parts/pma-pa26445/overview/
I have a TCI trans and flex plate that haven't seen the track yet. The flex plate (157 tooth) looks nice and strong but I had a lot of quality control issues with the C4. The case wouldn't fit the transbrake solenoid they sold me (push in solenoid, threaded case) and the piston in the foreword shift solenoid had a huge chip in it. I replaced the whole shift solenoid with a Performance Auto unit. The pan provided with it wasn't a flush fit and leaked like a sive. Had to replace that with a Moroso pan. For these reasons they won't be getting any future business from me.
PA and others sell "heavy duty" pump gaskets. They are worth the extra buck or two. $20, actually.
I put an SFI bell housing on my motor and have a new stock 157 tooth one here I don't need. Send me a PM if you're interested. Shipping+cheap...
Dale